66665244256604 has 12 divisors (see below), whose sum is σ = 133330488513264. Its totient is φ = 28570818967104.

The previous prime is 66665244256579. The next prime is 66665244256651. The reversal of 66665244256604 is 40665244256666.

66665244256604 is an admirable number.

It is a super-2 number, since 2×66665244256604² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190450790269 + ... + 1190450790324.

It is an arithmetic number, because the mean of its divisors is an integer number (11110874042772).

Almost surely, 2^{66665244256604} is an apocalyptic number.

It is an amenable number.

66665244256604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66665244256604 is a wasteful number, since it uses less digits than its factorization.

66665244256604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380901580604 (or 2380901580602 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 62.

Adding to 66665244256604 its sum of digits (62), we get a palindrome (66665244256666).

The spelling of 66665244256604 in words is "sixty-six trillion, six hundred sixty-five billion, two hundred forty-four million, two hundred fifty-six thousand, six hundred four".