68166915 has 8 divisors (see below), whose sum is σ = 109067088. Its totient is φ = 36355680.

The previous prime is 68166899. The next prime is 68166929. The reversal of 68166915 is 51966186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68166915 - 2⁴ = 68166899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272216 + ... + 2272245.

It is an arithmetic number, because the mean of its divisors is an integer number (13633386).

Almost surely, 2^68166915 is an apocalyptic number.

68166915 is a deficient number, since it is larger than the sum of its proper divisors (40900173).

68166915 is a wasteful number, since it uses less digits than its factorization.

68166915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544469.

The product of its digits is 77760, while the sum is 42.

The square root of 68166915 is about 8256.3257566547. The cubic root of 68166915 is about 408.4992027319.

It can be divided in two parts, 6816 and 6915, that added together give a palindrome (13731).

The spelling of 68166915 in words is "sixty-eight million, one hundred sixty-six thousand, nine hundred fifteen".