66357977975366 has 16 divisors (see below), whose sum is σ = 124098036733440. Its totient is φ = 25853757652680.

The previous prime is 66357977975357. The next prime is 66357977975369.

66357977975366 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357977975369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215447980286 + ... + 215447980593.

It is an arithmetic number, because the mean of its divisors is an integer number (7756127295840).

Almost surely, 2^{66357977975366} is an apocalyptic number.

66357977975366 is a deficient number, since it is larger than the sum of its proper divisors (57740058758074).

66357977975366 is a wasteful number, since it uses less digits than its factorization.

66357977975366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430895960899.

The product of its digits is 56710659600, while the sum is 86.

The spelling of 66357977975366 in words is "sixty-six trillion, three hundred fifty-seven billion, nine hundred seventy-seven million, nine hundred seventy-five thousand, three hundred sixty-six".