650663680 has 36 divisors (see below), whose sum is σ = 1558545912. Its totient is φ = 260264960.

The previous prime is 650663677. The next prime is 650663693. The reversal of 650663680 is 86366056.

It is a super-2 number, since 2×650663680² = 846726448942284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252886 + ... + 255445.

It is an arithmetic number, because the mean of its divisors is an integer number (43292942).

Almost surely, 2^650663680 is an apocalyptic number.

It is an amenable number.

650663680 is an abundant number, since it is smaller than the sum of its proper divisors (907882232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

650663680 is an equidigital number, since it uses as much as digits as its factorization.

650663680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508352 (or 508338 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 650663680 is about 25508.1100828736. The cubic root of 650663680 is about 866.5338284240.

The spelling of 650663680 in words is "six hundred fifty million, six hundred sixty-three thousand, six hundred eighty".