667406244 has 12 divisors (see below), whose sum is σ = 1557281264. Its totient is φ = 222468744.

The previous prime is 667406231. The next prime is 667406279. The reversal of 667406244 is 442604766.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27808582 + ... + 27808605.

Almost surely, 2^667406244 is an apocalyptic number.

It is an amenable number.

667406244 is an abundant number, since it is smaller than the sum of its proper divisors (889875020).

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

667406244 is a wasteful number, since it uses less digits than its factorization.

667406244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55617194 (or 55617192 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

The square root of 667406244 is about 25834.2068583496. The cubic root of 667406244 is about 873.9033855086.

The spelling of 667406244 in words is "six hundred sixty-seven million, four hundred six thousand, two hundred forty-four".