656663091 has 8 divisors (see below), whose sum is σ = 1000629504. Its totient is φ = 375236040.

The previous prime is 656663071. The next prime is 656663099. The reversal of 656663091 is 190366656.

656663091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656663091 - 2⁶ = 656663027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656663099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15634815 + ... + 15634856.

It is an arithmetic number, because the mean of its divisors is an integer number (125078688).

Almost surely, 2^656663091 is an apocalyptic number.

656663091 is a deficient number, since it is larger than the sum of its proper divisors (343966413).

656663091 is a wasteful number, since it uses less digits than its factorization.

656663091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31269681.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 656663091 is about 25625.4383572262. The cubic root of 656663091 is about 869.1889614297.

The spelling of 656663091 in words is "six hundred fifty-six million, six hundred sixty-three thousand, ninety-one".