66031637142240 has 3456 divisors, whose sum is σ = 302052807254016. Its totient is φ = 12838337740800.

The previous prime is 66031637142217. The next prime is 66031637142277. The reversal of 66031637142240 is 4224173613066.

66031637142240 is a `hidden beast` number, since 6 + 6 + 0 + 3 + 1 + 637 + 1 + 4 + 2 + 2 + 4 + 0 = 666.

It is a super-2 number, since 2×66031637142240² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 166326541722 + ... + 166326542118.

It is an arithmetic number, because the mean of its divisors is an integer number (87399539136).

Almost surely, 2^{66031637142240} is an apocalyptic number.

66031637142240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66031637142240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151026403627008).

66031637142240 is an abundant number, since it is smaller than the sum of its proper divisors (236021170111776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66031637142240 is a wasteful number, since it uses less digits than its factorization.

66031637142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 66031637142240 in words is "sixty-six trillion, thirty-one billion, six hundred thirty-seven million, one hundred forty-two thousand, two hundred forty".