78660885 has 8 divisors (see below), whose sum is σ = 125857440. Its totient is φ = 41952464.

The previous prime is 78660877. The next prime is 78660917. The reversal of 78660885 is 58806687.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78660885 - 2³ = 78660877 is a prime.

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, 2622015 + ... + 2622044.

It is an arithmetic number, because the mean of its divisors is an integer number (15732180).

Almost surely, 2^78660885 is an apocalyptic number.

It is an amenable number.

78660885 is a deficient number, since it is larger than the sum of its proper divisors (47196555).

78660885 is a wasteful number, since it uses less digits than its factorization.

78660885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244067.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 78660885 is about 8869.0971919356. The cubic root of 78660885 is about 428.4692007761.

It can be divided in two parts, 78660 and 885, that multiplied together give a triangular number (69614100 = T₁₁₇₉₉).

The spelling of 78660885 in words is "seventy-eight million, six hundred sixty thousand, eight hundred eighty-five".