66604153345524 has 72 divisors (see below), whose sum is σ = 170349900913920. Its totient is φ = 21940499106432.

The previous prime is 66604153345523. The next prime is 66604153345567. The reversal of 66604153345524 is 42554335140666.

It is a super-2 number, since 2×66604153345524² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604153345523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29179294 + ... + 31378965.

Almost surely, 2^{66604153345524} is an apocalyptic number.

It is an amenable number.

66604153345524 is an abundant number, since it is smaller than the sum of its proper divisors (103745747568396).

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

66604153345524 is a wasteful number, since it uses less digits than its factorization.

66604153345524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60558629 (or 60558624 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 66604153345524 in words is "sixty-six trillion, six hundred four billion, one hundred fifty-three million, three hundred forty-five thousand, five hundred twenty-four".