68664907 has 4 divisors (see below), whose sum is σ = 70879936. Its totient is φ = 66449880.

The previous prime is 68664901. The next prime is 68664919. The reversal of 68664907 is 70946686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68664907 - 2¹⁵ = 68632139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68664901) 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, 1107468 + ... + 1107529.

It is an arithmetic number, because the mean of its divisors is an integer number (17719984).

Almost surely, 2^68664907 is an apocalyptic number.

68664907 is a deficient number, since it is larger than the sum of its proper divisors (2215029).

68664907 is a wasteful number, since it uses less digits than its factorization.

68664907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215028.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 68664907 is about 8286.4290861625. The cubic root of 68664907 is about 409.4915509644.

The spelling of 68664907 in words is "sixty-eight million, six hundred sixty-four thousand, nine hundred seven".