663618950 has 24 divisors (see below), whose sum is σ = 1239650568. Its totient is φ = 264303680.

The previous prime is 663618941. The next prime is 663618959. The reversal of 663618950 is 59816366.

It is an interprime number because it is at equal distance from previous prime (663618941) and next prime (663618959).

It is a super-2 number, since 2×663618950² = 880780221598205000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) 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 (663618959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16832 + ... + 40131.

It is an arithmetic number, because the mean of its divisors is an integer number (51652107).

Almost surely, 2^663618950 is an apocalyptic number.

663618950 is a deficient number, since it is larger than the sum of its proper divisors (576031618).

663618950 is a wasteful number, since it uses less digits than its factorization.

663618950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57208 (or 57203 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 663618950 is about 25760.8025884288. The cubic root of 663618950 is about 872.2472181176.

The spelling of 663618950 in words is "six hundred sixty-three million, six hundred eighteen thousand, nine hundred fifty".