663657356 has 48 divisors (see below), whose sum is σ = 1264564224. Its totient is φ = 303534336.

The previous prime is 663657349. The next prime is 663657359. The reversal of 663657356 is 653756366.

It is a super-3 number, since 3×663657356³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 663657356.

It is not an unprimeable number, because it can be changed into a prime (663657359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 768581 + ... + 769443.

It is an arithmetic number, because the mean of its divisors is an integer number (26345088).

Almost surely, 2^663657356 is an apocalyptic number.

It is an amenable number.

663657356 is a deficient number, since it is larger than the sum of its proper divisors (600906868).

663657356 is a wasteful number, since it uses less digits than its factorization.

663657356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1188 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 47.

The square root of 663657356 is about 25761.5480124933. The cubic root of 663657356 is about 872.2640444808.

The spelling of 663657356 in words is "six hundred sixty-three million, six hundred fifty-seven thousand, three hundred fifty-six".