663677919 has 6 divisors (see below), whose sum is σ = 958645896. Its totient is φ = 442451940.

The previous prime is 663677893. The next prime is 663677933. The reversal of 663677919 is 919776366.

It is not a de Polignac number, because 663677919 - 2⁹ = 663677407 is a prime.

It is a super-2 number, since 2×663677919² = 880936760336341122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663677219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36870987 + ... + 36871004.

It is an arithmetic number, because the mean of its divisors is an integer number (159774316).

Almost surely, 2^663677919 is an apocalyptic number.

663677919 is a deficient number, since it is larger than the sum of its proper divisors (294967977).

663677919 is a wasteful number, since it uses less digits than its factorization.

663677919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73741997 (or 73741994 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 663677919 is about 25761.9471119712. The cubic root of 663677919 is about 872.2730532361.

The spelling of 663677919 in words is "six hundred sixty-three million, six hundred seventy-seven thousand, nine hundred nineteen".