665432615377 has 8 divisors (see below), whose sum is σ = 673963804800. Its totient is φ = 656904125904.

The previous prime is 665432615333. The next prime is 665432615383. The reversal of 665432615377 is 773516234566.

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 665432615377 - 2¹⁵ = 665432582609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665432915377) 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, 176563 + ... + 1167064.

It is an arithmetic number, because the mean of its divisors is an integer number (84245475600).

Almost surely, 2^665432615377 is an apocalyptic number.

It is an amenable number.

665432615377 is a deficient number, since it is larger than the sum of its proper divisors (8531189423).

665432615377 is a wasteful number, since it uses less digits than its factorization.

665432615377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349975.

The product of its digits is 19051200, while the sum is 55.

The spelling of 665432615377 in words is "six hundred sixty-five billion, four hundred thirty-two million, six hundred fifteen thousand, three hundred seventy-seven".