667400537265516 has 144 divisors (see below), whose sum is σ = 1691226308772000. Its totient is φ = 221915704098816.

The previous prime is 667400537265487. The next prime is 667400537265521. The reversal of 667400537265516 is 615562735004766.

667400537265516 is a `hidden beast` number, since 6 + 6 + 7 + 4 + 0 + 0 + 5 + 3 + 72 + 6 + 551 + 6 = 666.

It is a super-2 number, since 2×667400537265516² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114811718626 + ... + 114811724438.

It is an arithmetic number, because the mean of its divisors is an integer number (11744627144250).

Almost surely, 2^{667400537265516} is an apocalyptic number.

It is an amenable number.

667400537265516 is an abundant number, since it is smaller than the sum of its proper divisors (1023825771506484).

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

667400537265516 is a wasteful number, since it uses less digits than its factorization.

667400537265516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768 (or 10763 counting only the distinct ones).

The product of its (nonzero) digits is 190512000, while the sum is 63.

The spelling of 667400537265516 in words is "six hundred sixty-seven trillion, four hundred billion, five hundred thirty-seven million, two hundred sixty-five thousand, five hundred sixteen".