650640606 has 64 divisors (see below), whose sum is σ = 1692942336. Its totient is φ = 161647200.

The previous prime is 650640593. The next prime is 650640623. The reversal of 650640606 is 606046056.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19990 + ... + 41241.

It is an arithmetic number, because the mean of its divisors is an integer number (26452224).

Almost surely, 2^650640606 is an apocalyptic number.

650640606 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

650640606 is an abundant number, since it is smaller than the sum of its proper divisors (1042301730).

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

650640606 is a wasteful number, since it uses less digits than its factorization.

650640606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61277.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 650640606 is about 25507.6577913379. The cubic root of 650640606 is about 866.5235852223.

The spelling of 650640606 in words is "six hundred fifty million, six hundred forty thousand, six hundred six".