66701713 has 16 divisors (see below), whose sum is σ = 74558736. Its totient is φ = 59270400.

The previous prime is 66701689. The next prime is 66701717. The reversal of 66701713 is 31710766.

It can be written as a sum of positive squares in 8 ways, for example, as 25331089 + 41370624 = 5033^2 + 6432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66701713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66701717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47895 + ... + 49267.

It is an arithmetic number, because the mean of its divisors is an integer number (4659921).

Almost surely, 2^66701713 is an apocalyptic number.

It is an amenable number.

66701713 is a deficient number, since it is larger than the sum of its proper divisors (7857023).

66701713 is a wasteful number, since it uses less digits than its factorization.

66701713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 66701713 is about 8167.1116681480. Note that the first 3 decimals coincide. The cubic root of 66701713 is about 405.5511735506.

The spelling of 66701713 in words is "sixty-six million, seven hundred one thousand, seven hundred thirteen".