66502600572066 has 32 divisors (see below), whose sum is σ = 140006446123200. Its totient is φ = 21000675548160.

The previous prime is 66502600571989. The next prime is 66502600572193. The reversal of 66502600572066 is 66027500620566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15115986 + ... + 19013106.

It is an arithmetic number, because the mean of its divisors is an integer number (4375201441350).

Almost surely, 2^{66502600572066} is an apocalyptic number.

66502600572066 is an abundant number, since it is smaller than the sum of its proper divisors (73503845551134).

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

66502600572066 is a wasteful number, since it uses less digits than its factorization.

66502600572066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046834.

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 66502600572066 in words is "sixty-six trillion, five hundred two billion, six hundred million, five hundred seventy-two thousand, sixty-six".