656066213 has 4 divisors (see below), whose sum is σ = 715708608. Its totient is φ = 596423820.

The previous prime is 656066207. The next prime is 656066249. The reversal of 656066213 is 312660656.

656066213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656066213 - 2⁶ = 656066149 is a prime.

It is a super-2 number, since 2×656066213² = 860845751680322738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656066263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29821181 + ... + 29821202.

It is an arithmetic number, because the mean of its divisors is an integer number (178927152).

Almost surely, 2^656066213 is an apocalyptic number.

It is an amenable number.

656066213 is a deficient number, since it is larger than the sum of its proper divisors (59642395).

656066213 is a wasteful number, since it uses less digits than its factorization.

656066213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59642394.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 656066213 is about 25613.7895087783. The cubic root of 656066213 is about 868.9255300272.

The spelling of 656066213 in words is "six hundred fifty-six million, sixty-six thousand, two hundred thirteen".