66355056240 has 160 divisors (see below), whose sum is σ = 224911247616. Its totient is φ = 16049479680.

The previous prime is 66355056233. The next prime is 66355056311. The reversal of 66355056240 is 4265055366.

It is a super-2 number, since 2×66355056240² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66355056192 and 66355056201.

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 31 ways as a sum of consecutive naturals, for example, 1141152 + ... + 1197888.

Almost surely, 2^66355056240 is an apocalyptic number.

66355056240 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 66355056240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112455623808).

66355056240 is an abundant number, since it is smaller than the sum of its proper divisors (158556191376).

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

66355056240 is a wasteful number, since it uses less digits than its factorization.

66355056240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57207 (or 57201 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 66355056240 in words is "sixty-six billion, three hundred fifty-five million, fifty-six thousand, two hundred forty".