66156713 has 12 divisors (see below), whose sum is σ = 77571072. Its totient is φ = 56253960.

The previous prime is 66156679. The next prime is 66156719. The reversal of 66156713 is 31765166.

It is a happy number.

It is not a de Polignac number, because 66156713 - 2²² = 61962409 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66156719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 908 + ... + 11538.

It is an arithmetic number, because the mean of its divisors is an integer number (6464256).

Almost surely, 2^66156713 is an apocalyptic number.

It is an amenable number.

66156713 is a deficient number, since it is larger than the sum of its proper divisors (11414359).

66156713 is a wasteful number, since it uses less digits than its factorization.

66156713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10772 (or 10765 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 66156713 is about 8133.6777044582. The cubic root of 66156713 is about 404.4436052196.

The spelling of 66156713 in words is "sixty-six million, one hundred fifty-six thousand, seven hundred thirteen".