68765666 has 16 divisors (see below), whose sum is σ = 106118208. Its totient is φ = 33406800.

The previous prime is 68765659. The next prime is 68765677. The reversal of 68765666 is 66656786.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6731 + ... + 13521.

It is an arithmetic number, because the mean of its divisors is an integer number (6632388).

Almost surely, 2^68765666 is an apocalyptic number.

68765666 is a deficient number, since it is larger than the sum of its proper divisors (37352542).

68765666 is a wasteful number, since it uses less digits than its factorization.

68765666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937.

The product of its digits is 2177280, while the sum is 50.

The square root of 68765666 is about 8292.5066174227. The cubic root of 68765666 is about 409.6917492693.

The spelling of 68765666 in words is "sixty-eight million, seven hundred sixty-five thousand, six hundred sixty-six".