667115556 has 48 divisors (see below), whose sum is σ = 1592887296. Its totient is φ = 217207584.

The previous prime is 667115531. The next prime is 667115557. The reversal of 667115556 is 655511766.

It is not an unprimeable number, because it can be changed into a prime (667115557) 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, 409215 + ... + 410841.

It is an arithmetic number, because the mean of its divisors is an integer number (33185152).

Almost surely, 2^667115556 is an apocalyptic number.

It is an amenable number.

667115556 is an abundant number, since it is smaller than the sum of its proper divisors (925771740).

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

667115556 is a wasteful number, since it uses less digits than its factorization.

667115556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2406 counting only the distinct ones).

The product of its digits is 189000, while the sum is 42.

The square root of 667115556 is about 25828.5802164966. The cubic root of 667115556 is about 873.7764912220.

The spelling of 667115556 in words is "six hundred sixty-seven million, one hundred fifteen thousand, five hundred fifty-six".