671364116657 has 4 divisors (see below), whose sum is σ = 723007510260. Its totient is φ = 619720723056.

The previous prime is 671364116639. The next prime is 671364116677. The reversal of 671364116657 is 756611463176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173148364321 + 498215752336 = 416111^2 + 705844^2 .

It is a cyclic number.

It is not a de Polignac number, because 671364116657 - 2¹⁰ = 671364115633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671364116599 and 671364116608.

It is not an unprimeable number, because it can be changed into a prime (671364116627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25821696782 + ... + 25821696807.

It is an arithmetic number, because the mean of its divisors is an integer number (180751877565).

Almost surely, 2^671364116657 is an apocalyptic number.

It is an amenable number.

671364116657 is a deficient number, since it is larger than the sum of its proper divisors (51643393603).

671364116657 is a wasteful number, since it uses less digits than its factorization.

671364116657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51643393602.

The product of its digits is 3810240, while the sum is 53.

The spelling of 671364116657 in words is "six hundred seventy-one billion, three hundred sixty-four million, one hundred sixteen thousand, six hundred fifty-seven".