718866 has 12 divisors (see below), whose sum is σ = 1557582. Its totient is φ = 239616.

The previous prime is 718847. The next prime is 718871. The reversal of 718866 is 668817.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 221841 = 705^2 + 471^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 718866.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 718866.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19951 + ... + 19986.

2⁷¹⁸⁸⁶⁶ is an apocalyptic number.

718866 is an abundant number, since it is smaller than the sum of its proper divisors (838716).

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

718866 is a wasteful number, since it uses less digits than its factorization.

718866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39945 (or 39942 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 718866 is about 847.8596581982. The cubic root of 718866 is about 89.5810154559.

The spelling of 718866 in words is "seven hundred eighteen thousand, eight hundred sixty-six".