671671465 has 16 divisors (see below), whose sum is σ = 835560000. Its totient is φ = 517712832.

The previous prime is 671671457. The next prime is 671671477. The reversal of 671671465 is 564176176.

It is a cyclic number.

It is not a de Polignac number, because 671671465 - 2³ = 671671457 is a prime.

It is a super-2 number, since 2×671671465² = 902285113790492450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 67714 + ... + 76996.

It is an arithmetic number, because the mean of its divisors is an integer number (52222500).

Almost surely, 2^671671465 is an apocalyptic number.

It is an amenable number.

671671465 is a deficient number, since it is larger than the sum of its proper divisors (163888535).

671671465 is a wasteful number, since it uses less digits than its factorization.

671671465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9816.

The product of its digits is 211680, while the sum is 43.

The square root of 671671465 is about 25916.6252625607. The cubic root of 671671465 is about 875.7610641025.

The spelling of 671671465 in words is "six hundred seventy-one million, six hundred seventy-one thousand, four hundred sixty-five".