66515165015600 has 60 divisors (see below), whose sum is σ = 182631638807664. Its totient is φ = 22805199432960.

The previous prime is 66515165015549. The next prime is 66515165015653. The reversal of 66515165015600 is 651056151566.

66515165015600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11877705239 + ... + 11877710838.

Almost surely, 2^{66515165015600} is an apocalyptic number.

It is an amenable number.

66515165015600 is an abundant number, since it is smaller than the sum of its proper divisors (116116473792064).

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

66515165015600 is a wasteful number, since it uses less digits than its factorization.

66515165015600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23755416102 (or 23755416091 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 66515165015600 in words is "sixty-six trillion, five hundred fifteen billion, one hundred sixty-five million, fifteen thousand, six hundred".