6638310138366 has 16 divisors (see below), whose sum is σ = 14751800307600. Its totient is φ = 2212770046104.

The previous prime is 6638310138329. The next prime is 6638310138391.

It is a happy number.

6638310138366 is a `hidden beast` number, since 6 + 63 + 83 + 10 + 138 + 366 = 666.

6638310138366 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6638310138366² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 122931669229 = 6638310138366 / (6 + 6 + 3 + 8 + 3 + 1 + 0 + 1 + 3 + 8 + 3 + 6 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61465834561 + ... + 61465834668.

It is an arithmetic number, because the mean of its divisors is an integer number (921987519225).

Almost surely, 2^{6638310138366} is an apocalyptic number.

6638310138366 is an abundant number, since it is smaller than the sum of its proper divisors (8113490169234).

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

6638310138366 is a wasteful number, since it uses less digits than its factorization.

6638310138366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122931669240 (or 122931669234 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 6638310138366 in words is "six trillion, six hundred thirty-eight billion, three hundred ten million, one hundred thirty-eight thousand, three hundred sixty-six".