671656522 has 4 divisors (see below), whose sum is σ = 1007484786. Its totient is φ = 335828260.

The previous prime is 671656483. The next prime is 671656537. The reversal of 671656522 is 225656176.

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., 649179441 + 22477081 = 25479^2 + 4741^2 .

It is a super-2 number, since 2×671656522² = 902244967090272968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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, 167914129 + ... + 167914132.

Almost surely, 2^671656522 is an apocalyptic number.

671656522 is a deficient number, since it is larger than the sum of its proper divisors (335828264).

671656522 is a wasteful number, since it uses less digits than its factorization.

671656522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335828263.

The product of its digits is 151200, while the sum is 40.

The square root of 671656522 is about 25916.3369711076. The cubic root of 671656522 is about 875.7545695610.

The spelling of 671656522 in words is "six hundred seventy-one million, six hundred fifty-six thousand, five hundred twenty-two".