78737664 has 36 divisors (see below), whose sum is σ = 209559056. Its totient is φ = 26245632.

The previous prime is 78737657. The next prime is 78737699. The reversal of 78737664 is 46673787.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 50494 + ... + 52029.

Almost surely, 2^78737664 is an apocalyptic number.

It is an amenable number.

78737664 is an abundant number, since it is smaller than the sum of its proper divisors (130821392).

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

78737664 is a wasteful number, since it uses less digits than its factorization.

78737664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102542 (or 102528 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 48.

The square root of 78737664 is about 8873.4245925685. The cubic root of 78737664 is about 428.6085616080.

It can be divided in two parts, 78737 and 664, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 78737664 in words is "seventy-eight million, seven hundred thirty-seven thousand, six hundred sixty-four".