671657122017 has 24 divisors (see below), whose sum is σ = 1167123488960. Its totient is φ = 363603854880.

The previous prime is 671657121959. The next prime is 671657122033. The reversal of 671657122017 is 710221756176.

671657122017 is a `hidden beast` number, since 6 + 71 + 6 + 571 + 2 + 2 + 0 + 1 + 7 = 666.

It is not a de Polignac number, because 671657122017 - 2⁶ = 671657121953 is a prime.

It is a super-2 number, since 2×671657122017² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671657127017) 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, 280557334 + ... + 280559727.

Almost surely, 2^671657122017 is an apocalyptic number.

It is an amenable number.

671657122017 is a deficient number, since it is larger than the sum of its proper divisors (495466366943).

671657122017 is a wasteful number, since it uses less digits than its factorization.

671657122017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561117093 (or 561117090 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The spelling of 671657122017 in words is "six hundred seventy-one billion, six hundred fifty-seven million, one hundred twenty-two thousand, seventeen".