71317666 has 16 divisors (see below), whose sum is σ = 124332480. Its totient is φ = 30046320.

The previous prime is 71317663. The next prime is 71317691. The reversal of 71317666 is 66671317.

It is not an unprimeable number, because it can be changed into a prime (71317661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42345 + ... + 43996.

It is an arithmetic number, because the mean of its divisors is an integer number (7770780).

Almost surely, 2^71317666 is an apocalyptic number.

71317666 is a deficient number, since it is larger than the sum of its proper divisors (53014814).

71317666 is a wasteful number, since it uses less digits than its factorization.

71317666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86409.

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

The square root of 71317666 is about 8444.9787447927. The cubic root of 71317666 is about 414.6984134885.

The spelling of 71317666 in words is "seventy-one million, three hundred seventeen thousand, six hundred sixty-six".