665452117607 has 4 divisors (see below), whose sum is σ = 668830047336. Its totient is φ = 662074187880.

The previous prime is 665452117601. The next prime is 665452117639. The reversal of 665452117607 is 706711254566.

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

It is a cyclic number.

It is not a de Polignac number, because 665452117607 - 2¹² = 665452113511 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 (665452117601) 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, 1688964569 + ... + 1688964962.

It is an arithmetic number, because the mean of its divisors is an integer number (167207511834).

Almost surely, 2^665452117607 is an apocalyptic number.

665452117607 is a deficient number, since it is larger than the sum of its proper divisors (3377929729).

665452117607 is a wasteful number, since it uses less digits than its factorization.

665452117607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377929728.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 665452117607 in words is "six hundred sixty-five billion, four hundred fifty-two million, one hundred seventeen thousand, six hundred seven".