663739296 has 96 divisors (see below), whose sum is σ = 2012568768. Its totient is φ = 189296640.

The previous prime is 663739261. The next prime is 663739303. The reversal of 663739296 is 692937366.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535 + ... + 36438.

It is an arithmetic number, because the mean of its divisors is an integer number (20964258).

Almost surely, 2^663739296 is an apocalyptic number.

663739296 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663739296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006284384).

663739296 is an abundant number, since it is smaller than the sum of its proper divisors (1348829472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663739296 is a wasteful number, since it uses less digits than its factorization.

663739296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37014 (or 37006 counting only the distinct ones).

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

The square root of 663739296 is about 25763.1383181475. The cubic root of 663739296 is about 872.2999417069.

The spelling of 663739296 in words is "six hundred sixty-three million, seven hundred thirty-nine thousand, two hundred ninety-six".