663239697 has 8 divisors (see below), whose sum is σ = 904885344. Its totient is φ = 431876928.

The previous prime is 663239663. The next prime is 663239719. The reversal of 663239697 is 796932366.

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-663239697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663239617) 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, 2570568 + ... + 2570825.

It is an arithmetic number, because the mean of its divisors is an integer number (113110668).

Almost surely, 2^663239697 is an apocalyptic number.

It is an amenable number.

663239697 is a deficient number, since it is larger than the sum of its proper divisors (241645647).

663239697 is a wasteful number, since it uses less digits than its factorization.

663239697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141439.

The product of its digits is 2204496, while the sum is 51.

The square root of 663239697 is about 25753.4404886027. The cubic root of 663239697 is about 872.0810256506.

The spelling of 663239697 in words is "six hundred sixty-three million, two hundred thirty-nine thousand, six hundred ninety-seven".