78867711 has 12 divisors (see below), whose sum is σ = 122683288. Its totient is φ = 48533904.

The previous prime is 78867707. The next prime is 78867721. The reversal of 78867711 is 11776887.

It is a happy number.

It is not a de Polignac number, because 78867711 - 2² = 78867707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78867721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336925 + ... + 337158.

Almost surely, 2^78867711 is an apocalyptic number.

78867711 is a deficient number, since it is larger than the sum of its proper divisors (43815577).

78867711 is a wasteful number, since it uses less digits than its factorization.

78867711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674102 (or 674099 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 78867711 is about 8880.7494616164. The cubic root of 78867711 is about 428.8444021434.

The spelling of 78867711 in words is "seventy-eight million, eight hundred sixty-seven thousand, seven hundred eleven".