66164305556610 has 128 divisors (see below), whose sum is σ = 182134711296000. Its totient is φ = 17074189817280.

The previous prime is 66164305556567. The next prime is 66164305556749. The reversal of 66164305556610 is 1665550346166.

66164305556610 is a `hidden beast` number, since 6 + 6 + 1 + 64 + 3 + 0 + 5 + 5 + 566 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 386164741 + ... + 386336039.

It is an arithmetic number, because the mean of its divisors is an integer number (1422927432000).

Almost surely, 2^{66164305556610} is an apocalyptic number.

66164305556610 is an abundant number, since it is smaller than the sum of its proper divisors (115970405739390).

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

66164305556610 is a wasteful number, since it uses less digits than its factorization.

66164305556610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217493 (or 217487 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 66164305556610 in words is "sixty-six trillion, one hundred sixty-four billion, three hundred five million, five hundred fifty-six thousand, six hundred ten".