71701664 has 48 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 34944000.

The previous prime is 71701639. The next prime is 71701691. The reversal of 71701664 is 46610717.

It is a happy number.

It is a super-2 number, since 2×71701664² = 10282257240737792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 71701664.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285539 + ... + 285789.

It is an arithmetic number, because the mean of its divisors is an integer number (3016440).

Almost surely, 2^71701664 is an apocalyptic number.

It is an amenable number.

71701664 is an abundant number, since it is smaller than the sum of its proper divisors (73087456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71701664 is a wasteful number, since it uses less digits than its factorization.

71701664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71701664 is about 8467.6835084927. The cubic root of 71701664 is about 415.4413729626.

The spelling of 71701664 in words is "seventy-one million, seven hundred one thousand, six hundred sixty-four".