68665929 has 4 divisors (see below), whose sum is σ = 91554576. Its totient is φ = 45777284.

The previous prime is 68665921. The next prime is 68665951. The reversal of 68665929 is 92956686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68665929 - 2³ = 68665921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68665921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11444319 + ... + 11444324.

It is an arithmetic number, because the mean of its divisors is an integer number (22888644).

Almost surely, 2^68665929 is an apocalyptic number.

It is an amenable number.

68665929 is a deficient number, since it is larger than the sum of its proper divisors (22888647).

68665929 is a wasteful number, since it uses less digits than its factorization.

68665929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22888646.

The product of its digits is 1399680, while the sum is 51.

The square root of 68665929 is about 8286.4907530269. The cubic root of 68665929 is about 409.4935825615.

The spelling of 68665929 in words is "sixty-eight million, six hundred sixty-five thousand, nine hundred twenty-nine".