71713666 has 8 divisors (see below), whose sum is σ = 107680140. Its totient is φ = 35820288.

The previous prime is 71713661. The next prime is 71713673. The reversal of 71713666 is 66631717.

It can be written as a sum of positive squares in 2 ways, for example, as 71318025 + 395641 = 8445^2 + 629^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71713661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15751 + ... + 19786.

Almost surely, 2^71713666 is an apocalyptic number.

71713666 is a deficient number, since it is larger than the sum of its proper divisors (35966474).

71713666 is a wasteful number, since it uses less digits than its factorization.

71713666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36548.

The product of its digits is 31752, while the sum is 37.

The square root of 71713666 is about 8468.3921732523. The cubic root of 71713666 is about 415.4645516398.

The spelling of 71713666 in words is "seventy-one million, seven hundred thirteen thousand, six hundred sixty-six".