667814813481 has 16 divisors (see below), whose sum is σ = 914519491200. Its totient is φ = 433160909568.

The previous prime is 667814813441. The next prime is 667814813489. The reversal of 667814813481 is 184318418766.

It is not a de Polignac number, because 667814813481 - 2⁷ = 667814813353 is a prime.

It is a super-2 number, since 2×667814813481² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667814813489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3325585 + ... + 3520673.

It is an arithmetic number, because the mean of its divisors is an integer number (57157468200).

Almost surely, 2^667814813481 is an apocalyptic number.

It is an amenable number.

667814813481 is a deficient number, since it is larger than the sum of its proper divisors (246704677719).

667814813481 is a wasteful number, since it uses less digits than its factorization.

667814813481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225968.

The product of its digits is 6193152, while the sum is 57.

The spelling of 667814813481 in words is "six hundred sixty-seven billion, eight hundred fourteen million, eight hundred thirteen thousand, four hundred eighty-one".