663409276 has 12 divisors (see below), whose sum is σ = 1161395872. Its totient is φ = 331581888.

The previous prime is 663409273. The next prime is 663409291. The reversal of 663409276 is 672904366.

It is a super-2 number, since 2×663409276² = 880223734965688352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663409273) 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, 17940 + ... + 40603.

Almost surely, 2^663409276 is an apocalyptic number.

It is an amenable number.

663409276 is a deficient number, since it is larger than the sum of its proper divisors (497986596).

663409276 is a wasteful number, since it uses less digits than its factorization.

663409276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61380 (or 61378 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 663409276 is about 25756.7326344007. The cubic root of 663409276 is about 872.1553446973.

The spelling of 663409276 in words is "six hundred sixty-three million, four hundred nine thousand, two hundred seventy-six".