78690676 has 6 divisors (see below), whose sum is σ = 137708690. Its totient is φ = 39345336.

The previous prime is 78690673. The next prime is 78690709. The reversal of 78690676 is 67609687.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 13468900 = 8076^2 + 3670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78690673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9836331 + ... + 9836338.

Almost surely, 2^78690676 is an apocalyptic number.

It is an amenable number.

78690676 is a deficient number, since it is larger than the sum of its proper divisors (59018014).

78690676 is a wasteful number, since it uses less digits than its factorization.

78690676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19672673 (or 19672671 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 78690676 is about 8870.7765161794. The cubic root of 78690676 is about 428.5232848988.

The spelling of 78690676 in words is "seventy-eight million, six hundred ninety thousand, six hundred seventy-six".