667126720 has 56 divisors (see below), whose sum is σ = 1710805824. Its totient is φ = 246322176.

The previous prime is 667126717. The next prime is 667126739. The reversal of 667126720 is 27621766.

It is a self number, because there is not a number n which added to its sum of digits gives 667126720.

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, 76024 + ... + 84343.

It is an arithmetic number, because the mean of its divisors is an integer number (30550104).

Almost surely, 2^667126720 is an apocalyptic number.

It is an amenable number.

667126720 is an abundant number, since it is smaller than the sum of its proper divisors (1043679104).

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

667126720 is a wasteful number, since it uses less digits than its factorization.

667126720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160397 (or 160387 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 667126720 is about 25828.7963327756. The cubic root of 667126720 is about 873.7813653333.

The spelling of 667126720 in words is "six hundred sixty-seven million, one hundred twenty-six thousand, seven hundred twenty".