671626164 has 48 divisors (see below), whose sum is σ = 1726554816. Its totient is φ = 201504000.

The previous prime is 671626147. The next prime is 671626169. The reversal of 671626164 is 461626176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671626169) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11857 + ... + 38520.

It is an arithmetic number, because the mean of its divisors is an integer number (35969892).

Almost surely, 2^671626164 is an apocalyptic number.

It is an amenable number.

671626164 is an abundant number, since it is smaller than the sum of its proper divisors (1054928652).

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

671626164 is a wasteful number, since it uses less digits than its factorization.

671626164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50496 (or 50494 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 671626164 is about 25915.7512721511. The cubic root of 671626164 is about 875.7413750402.

The spelling of 671626164 in words is "six hundred seventy-one million, six hundred twenty-six thousand, one hundred sixty-four".