665172614671 has 8 divisors (see below), whose sum is σ = 704665183824. Its totient is φ = 625720575360.

The previous prime is 665172614633. The next prime is 665172614693. The reversal of 665172614671 is 176416271566.

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 665172614671 - 2¹⁵ = 665172581903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665172644671) 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, 10098660 + ... + 10164313.

It is an arithmetic number, because the mean of its divisors is an integer number (88083147978).

Almost surely, 2^665172614671 is an apocalyptic number.

665172614671 is a deficient number, since it is larger than the sum of its proper divisors (39492569153).

665172614671 is a wasteful number, since it uses less digits than its factorization.

665172614671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20264921.

The product of its digits is 2540160, while the sum is 52.

The spelling of 665172614671 in words is "six hundred sixty-five billion, one hundred seventy-two million, six hundred fourteen thousand, six hundred seventy-one".