671530768121 has 8 divisors (see below), whose sum is σ = 676718517384. Its totient is φ = 666359256960.

The previous prime is 671530768033. The next prime is 671530768157. The reversal of 671530768121 is 121867035176.

It can be written as a sum of positive squares in 4 ways, for example, as 59124354025 + 612406414096 = 243155^2 + 782564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671530768121 - 2³⁸ = 396652861177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671530768921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3976490 + ... + 4141923.

It is an arithmetic number, because the mean of its divisors is an integer number (84589814673).

Almost surely, 2^671530768121 is an apocalyptic number.

It is an amenable number.

671530768121 is a deficient number, since it is larger than the sum of its proper divisors (5187749263).

671530768121 is a wasteful number, since it uses less digits than its factorization.

671530768121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119051.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 671530768121 in words is "six hundred seventy-one billion, five hundred thirty million, seven hundred sixty-eight thousand, one hundred twenty-one".