71664476 has 12 divisors (see below), whose sum is σ = 135060072. Its totient is φ = 33075888.

The previous prime is 71664451. The next prime is 71664493. The reversal of 71664476 is 67446617.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689030 + ... + 689133.

It is an arithmetic number, because the mean of its divisors is an integer number (11255006).

Almost surely, 2^71664476 is an apocalyptic number.

It is an amenable number.

71664476 is a deficient number, since it is larger than the sum of its proper divisors (63395596).

71664476 is a wasteful number, since it uses less digits than its factorization.

71664476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378180 (or 1378178 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 71664476 is about 8465.4873456878. The cubic root of 71664476 is about 415.3695377841.

The spelling of 71664476 in words is "seventy-one million, six hundred sixty-four thousand, four hundred seventy-six".