71662219204 has 27 divisors (see below), whose sum is σ = 126460395943. Its totient is φ = 35533161728.

The previous prime is 71662219199. The next prime is 71662219207. The reversal of 71662219204 is 40291226617.

The square root of 71662219204 is 267698.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 23963659204 + 47698560000 = 154802^2 + 218400^2 .

It is a super-2 number, since 2×71662219204² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71662219207) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73348764 + ... + 73349740.

Almost surely, 2^71662219204 is an apocalyptic number.

71662219204 is the 267698-th square number.

It is an amenable number.

71662219204 is a deficient number, since it is larger than the sum of its proper divisors (54798176739).

71662219204 is an frugal number, since it uses more digits than its factorization.

71662219204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 71662219204 in words is "seventy-one billion, six hundred sixty-two million, two hundred nineteen thousand, two hundred four".