665405506235 has 8 divisors (see below), whose sum is σ = 798631110816. Its totient is φ = 532228069440.

The previous prime is 665405506201. The next prime is 665405506267. The reversal of 665405506235 is 532605504566.

665405506235 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-665405506235 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665405506235.

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, 12011546 + ... + 12066815.

It is an arithmetic number, because the mean of its divisors is an integer number (99828888852).

Almost surely, 2^665405506235 is an apocalyptic number.

665405506235 is a deficient number, since it is larger than the sum of its proper divisors (133225604581).

665405506235 is a wasteful number, since it uses less digits than its factorization.

665405506235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083893.

The product of its (nonzero) digits is 3240000, while the sum is 47.

The spelling of 665405506235 in words is "six hundred sixty-five billion, four hundred five million, five hundred six thousand, two hundred thirty-five".