671613777 has 24 divisors (see below), whose sum is σ = 1016817984. Its totient is φ = 426358944.

The previous prime is 671613773. The next prime is 671613799. The reversal of 671613777 is 777316176.

It is not a de Polignac number, because 671613777 - 2² = 671613773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671613773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39843 + ... + 54135.

It is an arithmetic number, because the mean of its divisors is an integer number (42367416).

Almost surely, 2^671613777 is an apocalyptic number.

It is an amenable number.

671613777 is a deficient number, since it is larger than the sum of its proper divisors (345204207).

671613777 is a wasteful number, since it uses less digits than its factorization.

671613777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14549 (or 14546 counting only the distinct ones).

The product of its digits is 259308, while the sum is 45.

The square root of 671613777 is about 25915.5122851160. The cubic root of 671613777 is about 875.7359911547.

The spelling of 671613777 in words is "six hundred seventy-one million, six hundred thirteen thousand, seven hundred seventy-seven".