671012557 has 8 divisors (see below), whose sum is σ = 703819584. Its totient is φ = 638508288.

The previous prime is 671012521. The next prime is 671012567. The reversal of 671012557 is 755210176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671012557 - 2²⁷ = 536794829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671012567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71143 + ... + 80020.

It is an arithmetic number, because the mean of its divisors is an integer number (87977448).

Almost surely, 2^671012557 is an apocalyptic number.

It is an amenable number.

671012557 is a deficient number, since it is larger than the sum of its proper divisors (32807027).

671012557 is a wasteful number, since it uses less digits than its factorization.

671012557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151379.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 671012557 is about 25903.9100716475. The cubic root of 671012557 is about 875.4745972817.

The spelling of 671012557 in words is "six hundred seventy-one million, twelve thousand, five hundred fifty-seven".