663079161 has 4 divisors (see below), whose sum is σ = 884105552. Its totient is φ = 442052772.

The previous prime is 663079147. The next prime is 663079189. The reversal of 663079161 is 161970366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663079161 - 2⁶ = 663079097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663079561) 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, 110513191 + ... + 110513196.

It is an arithmetic number, because the mean of its divisors is an integer number (221026388).

Almost surely, 2^663079161 is an apocalyptic number.

It is an amenable number.

663079161 is a deficient number, since it is larger than the sum of its proper divisors (221026391).

663079161 is a wasteful number, since it uses less digits than its factorization.

663079161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221026390.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 663079161 is about 25750.3235125309. The cubic root of 663079161 is about 872.0106580810.

The spelling of 663079161 in words is "six hundred sixty-three million, seventy-nine thousand, one hundred sixty-one".