671378076801 has 6 divisors (see below), whose sum is σ = 969768333170. Its totient is φ = 447585384528.

The previous prime is 671378076701. The next prime is 671378076823. The reversal of 671378076801 is 108670873176.

It can be written as a sum of positive squares in only one way, i.e., 639104313600 + 32273763201 = 799440^2 + 179649^2 .

It is not a de Polignac number, because 671378076801 - 2⁷ = 671378076673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671378076601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37298782036 + ... + 37298782053.

Almost surely, 2^671378076801 is an apocalyptic number.

It is an amenable number.

671378076801 is a deficient number, since it is larger than the sum of its proper divisors (298390256369).

671378076801 is a wasteful number, since it uses less digits than its factorization.

671378076801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74597564095 (or 74597564092 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The spelling of 671378076801 in words is "six hundred seventy-one billion, three hundred seventy-eight million, seventy-six thousand, eight hundred one".