665401795 has 8 divisors (see below), whose sum is σ = 815471424. Its totient is φ = 520995264.

The previous prime is 665401783. The next prime is 665401801. The reversal of 665401795 is 597104566.

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 665401795 - 2⁹ = 665401283 is a prime.

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, 1415514 + ... + 1415983.

It is an arithmetic number, because the mean of its divisors is an integer number (101933928).

Almost surely, 2^665401795 is an apocalyptic number.

665401795 is a deficient number, since it is larger than the sum of its proper divisors (150069629).

665401795 is a wasteful number, since it uses less digits than its factorization.

665401795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831549.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 665401795 is about 25795.3832109546. The cubic root of 665401795 is about 873.0276313679.

The spelling of 665401795 in words is "six hundred sixty-five million, four hundred one thousand, seven hundred ninety-five".