66515232960 has 336 divisors, whose sum is σ = 249927904512. Its totient is φ = 16102656000.

The previous prime is 66515232941. The next prime is 66515232961. The reversal of 66515232960 is 6923251566.

66515232960 is a `hidden beast` number, since 6 + 65 + 1 + 523 + 2 + 9 + 60 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (66515232961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45840235 + ... + 45841685.

Almost surely, 2^66515232960 is an apocalyptic number.

66515232960 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 66515232960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124963952256).

66515232960 is an abundant number, since it is smaller than the sum of its proper divisors (183412671552).

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

66515232960 is a wasteful number, since it uses less digits than its factorization.

66515232960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 66515232960 in words is "sixty-six billion, five hundred fifteen million, two hundred thirty-two thousand, nine hundred sixty".