78660336 has 40 divisors (see below), whose sum is σ = 205500240. Its totient is φ = 25924096.

The previous prime is 78660311. The next prime is 78660341. The reversal of 78660336 is 63306687.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78660294 and 78660303.

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, 4935 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (5137506).

Almost surely, 2^78660336 is an apocalyptic number.

It is an amenable number.

78660336 is an abundant number, since it is smaller than the sum of its proper divisors (126839904).

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

78660336 is a wasteful number, since it uses less digits than its factorization.

78660336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18513 (or 18507 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 78660336 is about 8869.0662417190. The cubic root of 78660336 is about 428.4682039650.

The spelling of 78660336 in words is "seventy-eight million, six hundred sixty thousand, three hundred thirty-six".