665666075760835 has 8 divisors (see below), whose sum is σ = 798800298527376. Its totient is φ = 532532188865760.

The previous prime is 665666075760797. The next prime is 665666075760857. The reversal of 665666075760835 is 538067570666566.

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

It is not a de Polignac number, because 665666075760835 - 2⁴⁵ = 630481703672003 is a prime.

It is a super-2 number, since 2×665666075760835² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79586889 + ... + 87552298.

It is an arithmetic number, because the mean of its divisors is an integer number (99850037315922).

Almost surely, 2^{665666075760835} is an apocalyptic number.

665666075760835 is a deficient number, since it is larger than the sum of its proper divisors (133134222766541).

665666075760835 is a wasteful number, since it uses less digits than its factorization.

665666075760835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167935733.

The product of its (nonzero) digits is 6858432000, while the sum is 76.

The spelling of 665666075760835 in words is "six hundred sixty-five trillion, six hundred sixty-six billion, seventy-five million, seven hundred sixty thousand, eight hundred thirty-five".