663769748 has 12 divisors (see below), whose sum is σ = 1201652340. Its totient is φ = 320440512.

The previous prime is 663769747. The next prime is 663769753. The reversal of 663769748 is 847967366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 490268164 + 173501584 = 22142^2 + 13172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663769693 and 663769702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663769747) 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, 2860961 + ... + 2861192.

It is an arithmetic number, because the mean of its divisors is an integer number (100137695).

Almost surely, 2^663769748 is an apocalyptic number.

It is an amenable number.

663769748 is a deficient number, since it is larger than the sum of its proper divisors (537882592).

663769748 is a wasteful number, since it uses less digits than its factorization.

663769748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722186 (or 5722184 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 56.

The square root of 663769748 is about 25763.7293107966. The cubic root of 663769748 is about 872.3132817194.

The spelling of 663769748 in words is "six hundred sixty-three million, seven hundred sixty-nine thousand, seven hundred forty-eight".