663790065 has 8 divisors (see below), whose sum is σ = 1062064128. Its totient is φ = 354021360.

The previous prime is 663790033. The next prime is 663790067. The reversal of 663790065 is 560097366.

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

It is not a de Polignac number, because 663790065 - 2⁵ = 663790033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663789999 and 663790026.

It is not an unprimeable number, because it can be changed into a prime (663790067) 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, 22126321 + ... + 22126350.

It is an arithmetic number, because the mean of its divisors is an integer number (132758016).

Almost surely, 2^663790065 is an apocalyptic number.

It is an amenable number.

663790065 is a deficient number, since it is larger than the sum of its proper divisors (398274063).

663790065 is a wasteful number, since it uses less digits than its factorization.

663790065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44252679.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 663790065 is about 25764.1236024050. The cubic root of 663790065 is about 872.3221816972.

The spelling of 663790065 in words is "six hundred sixty-three million, seven hundred ninety thousand, sixty-five".