671776655995 has 16 divisors (see below), whose sum is σ = 849944334240. Its totient is φ = 508305383424.

The previous prime is 671776655981. The next prime is 671776656059. The reversal of 671776655995 is 599556677176.

It is a cyclic number.

It is not a de Polignac number, because 671776655995 - 2²⁷ = 671642438267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5709574 + ... + 5826043.

It is an arithmetic number, because the mean of its divisors is an integer number (53121520890).

Almost surely, 2^671776655995 is an apocalyptic number.

671776655995 is a deficient number, since it is larger than the sum of its proper divisors (178167678245).

671776655995 is a wasteful number, since it uses less digits than its factorization.

671776655995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11536254.

The product of its digits is 750141000, while the sum is 73.

The spelling of 671776655995 in words is "six hundred seventy-one billion, seven hundred seventy-six million, six hundred fifty-five thousand, nine hundred ninety-five".