78652866 has 8 divisors (see below), whose sum is σ = 157305744. Its totient is φ = 26217620.

The previous prime is 78652853. The next prime is 78652867. The reversal of 78652866 is 66825687.

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

78652866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (78652867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6554400 + ... + 6554411.

It is an arithmetic number, because the mean of its divisors is an integer number (19663218).

Almost surely, 2^78652866 is an apocalyptic number.

78652866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78652866 is a wasteful number, since it uses less digits than its factorization.

78652866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108816.

The product of its digits is 967680, while the sum is 48.

The square root of 78652866 is about 8868.6451050879. The cubic root of 78652866 is about 428.4546403361.

It can be divided in two parts, 7865 and 2866, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 78652866 in words is "seventy-eight million, six hundred fifty-two thousand, eight hundred sixty-six".