66124476402840 has 384 divisors, whose sum is σ = 228979386155520. Its totient is φ = 16491465216000.

The previous prime is 66124476402767. The next prime is 66124476402841. The reversal of 66124476402840 is 4820467442166.

66124476402840 is a `hidden beast` number, since 6 + 6 + 124 + 4 + 76 + 402 + 8 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66124476402841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4140276055 + ... + 4140292025.

It is an arithmetic number, because the mean of its divisors is an integer number (596300484780).

Almost surely, 2^{66124476402840} is an apocalyptic number.

66124476402840 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 66124476402840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114489693077760).

66124476402840 is an abundant number, since it is smaller than the sum of its proper divisors (162854909752680).

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

66124476402840 is a wasteful number, since it uses less digits than its factorization.

66124476402840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20223 (or 20216 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 54.

The spelling of 66124476402840 in words is "sixty-six trillion, one hundred twenty-four billion, four hundred seventy-six million, four hundred two thousand, eight hundred forty".