66160715 has 4 divisors (see below), whose sum is σ = 79392864. Its totient is φ = 52928568.

The previous prime is 66160669. The next prime is 66160723. The reversal of 66160715 is 51706166.

66160715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66160715 - 2⁸ = 66160459 is a prime.

It is a super-2 number, since 2×66160715² = 8754480418622450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6616067 + ... + 6616076.

It is an arithmetic number, because the mean of its divisors is an integer number (19848216).

Almost surely, 2^66160715 is an apocalyptic number.

66160715 is a deficient number, since it is larger than the sum of its proper divisors (13232149).

66160715 is a wasteful number, since it uses less digits than its factorization.

66160715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232148.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 66160715 is about 8133.9237149115. The cubic root of 66160715 is about 404.4517603541.

The spelling of 66160715 in words is "sixty-six million, one hundred sixty thousand, seven hundred fifteen".