68664039 has 32 divisors (see below), whose sum is σ = 100859904. Its totient is φ = 41411040.

The previous prime is 68664031. The next prime is 68664049. The reversal of 68664039 is 93046686.

It is not a de Polignac number, because 68664039 - 2³ = 68664031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68664031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100192 + ... + 100874.

It is an arithmetic number, because the mean of its divisors is an integer number (3151872).

Almost surely, 2^68664039 is an apocalyptic number.

68664039 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

68664039 is a deficient number, since it is larger than the sum of its proper divisors (32195865).

68664039 is a wasteful number, since it uses less digits than its factorization.

68664039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 68664039 is about 8286.3767112050. The cubic root of 68664039 is about 409.4898254825.

The spelling of 68664039 in words is "sixty-eight million, six hundred sixty-four thousand, thirty-nine".