656506026 has 64 divisors (see below), whose sum is σ = 1628605440. Its totient is φ = 194307120.

The previous prime is 656506001. The next prime is 656506027. The reversal of 656506026 is 620605656.

656506026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (656506027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12691 + ... + 38393.

It is an arithmetic number, because the mean of its divisors is an integer number (25446960).

Almost surely, 2^656506026 is an apocalyptic number.

656506026 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 656506026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814302720).

656506026 is an abundant number, since it is smaller than the sum of its proper divisors (972099414).

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

656506026 is a wasteful number, since it uses less digits than its factorization.

656506026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25768 (or 25762 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 656506026 is about 25622.3735434483. The cubic root of 656506026 is about 869.1196564583.

The spelling of 656506026 in words is "six hundred fifty-six million, five hundred six thousand, twenty-six".