71660506 has 4 divisors (see below), whose sum is σ = 107490762. Its totient is φ = 35830252.

The previous prime is 71660483. The next prime is 71660521. The reversal of 71660506 is 60506617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 17564481 = 7355^2 + 4191^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17915125 + ... + 17915128.

Almost surely, 2^71660506 is an apocalyptic number.

71660506 is a deficient number, since it is larger than the sum of its proper divisors (35830256).

71660506 is a wasteful number, since it uses less digits than its factorization.

71660506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35830255.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 71660506 is about 8465.2528609605. The cubic root of 71660506 is about 415.3618675612.

The spelling of 71660506 in words is "seventy-one million, six hundred sixty thousand, five hundred six".