650998656 has 384 divisors, whose sum is σ = 2405894400. Its totient is φ = 164044800.

The previous prime is 650998643. The next prime is 650998657. The reversal of 650998656 is 656899056.

650998656 is a `hidden beast` number, since 6 + 509 + 9 + 86 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×650998656² = 847598500227612672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650998657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3636775 + ... + 3636953.

It is an arithmetic number, because the mean of its divisors is an integer number (6265350).

Almost surely, 2^650998656 is an apocalyptic number.

650998656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 650998656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202947200).

650998656 is an abundant number, since it is smaller than the sum of its proper divisors (1754895744).

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

650998656 is a wasteful number, since it uses less digits than its factorization.

650998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The square root of 650998656 is about 25514.6753065760. The cubic root of 650998656 is about 866.6825064824.

The spelling of 650998656 in words is "six hundred fifty million, nine hundred ninety-eight thousand, six hundred fifty-six".