78583912866 has 48 divisors (see below), whose sum is σ = 180076047840. Its totient is φ = 24698338560.

The previous prime is 78583912837. The next prime is 78583912877. The reversal of 78583912866 is 66821938587.

It is a super-2 number, since 2×78583912866² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472335 + ... + 616658.

It is an arithmetic number, because the mean of its divisors is an integer number (3751584330).

Almost surely, 2^78583912866 is an apocalyptic number.

78583912866 is an abundant number, since it is smaller than the sum of its proper divisors (101492134974).

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

78583912866 is a wasteful number, since it uses less digits than its factorization.

78583912866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089231 (or 1089228 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 78583912866 in words is "seventy-eight billion, five hundred eighty-three million, nine hundred twelve thousand, eight hundred sixty-six".