68664906 has 12 divisors (see below), whose sum is σ = 148774002. Its totient is φ = 22888296.

The previous prime is 68664901. The next prime is 68664919. The reversal of 68664906 is 60946686.

It can be written as a sum of positive squares in only one way, i.e., 47734281 + 20930625 = 6909^2 + 4575^2 .

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 1907341 + ... + 1907376.

Almost surely, 2^68664906 is an apocalyptic number.

68664906 is an abundant number, since it is smaller than the sum of its proper divisors (80109096).

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

68664906 is a wasteful number, since it uses less digits than its factorization.

68664906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814725 (or 3814722 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 68664906 is about 8286.4290258229. The cubic root of 68664906 is about 409.4915489765.

The spelling of 68664906 in words is "sixty-eight million, six hundred sixty-four thousand, nine hundred six".