72684866 has 8 divisors (see below), whose sum is σ = 109133244. Its totient is φ = 36307120.

The previous prime is 72684851. The next prime is 72684881. The reversal of 72684866 is 66848627.

It is an interprime number because it is at equal distance from previous prime (72684851) and next prime (72684881).

It can be written as a sum of positive squares in 2 ways, for example, as 72165025 + 519841 = 8495^2 + 721^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72684866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15005 + ... + 19248.

Almost surely, 2^72684866 is an apocalyptic number.

72684866 is a deficient number, since it is larger than the sum of its proper divisors (36448378).

72684866 is a wasteful number, since it uses less digits than its factorization.

72684866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35316.

The product of its digits is 774144, while the sum is 47.

The square root of 72684866 is about 8525.5419769068. The cubic root of 72684866 is about 417.3316586189.

The spelling of 72684866 in words is "seventy-two million, six hundred eighty-four thousand, eight hundred sixty-six".