78900664 has 16 divisors (see below), whose sum is σ = 148883400. Its totient is φ = 39198432.

The previous prime is 78900643. The next prime is 78900719. The reversal of 78900664 is 46600987.

It is a congruent number.

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, 30154 + ... + 32665.

Almost surely, 2^78900664 is an apocalyptic number.

It is an amenable number.

78900664 is a deficient number, since it is larger than the sum of its proper divisors (69982736).

78900664 is a wasteful number, since it uses less digits than its factorization.

78900664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62982 (or 62978 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78900664 is about 8882.6045729842. The cubic root of 78900664 is about 428.9041213096.

The spelling of 78900664 in words is "seventy-eight million, nine hundred thousand, six hundred sixty-four".