66486777768466 has 32 divisors (see below), whose sum is σ = 109212271394688. Its totient is φ = 30105787511040.

The previous prime is 66486777768457. The next prime is 66486777768473.

66486777768466 is nontrivially palindromic in base 10.

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, 553272460 + ... + 553392616.

It is an arithmetic number, because the mean of its divisors is an integer number (3412883481084).

Almost surely, 2^{66486777768466} is an apocalyptic number.

66486777768466 is a deficient number, since it is larger than the sum of its proper divisors (42725493626222).

66486777768466 is a wasteful number, since it uses less digits than its factorization.

66486777768466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216066.

The product of its digits is 114709561344, while the sum is 88.

The spelling of 66486777768466 in words is "sixty-six trillion, four hundred eighty-six billion, seven hundred seventy-seven million, seven hundred sixty-eight thousand, four hundred sixty-six".