656612666045 has 16 divisors (see below), whose sum is σ = 910615322880. Its totient is φ = 445189709184.

The previous prime is 656612666023. The next prime is 656612666053. The reversal of 656612666045 is 540666216656.

It is a cyclic number.

It is not a de Polignac number, because 656612666045 - 2¹⁴ = 656612649661 is a prime.

It is a super-2 number, since 2×656612666045² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105392177 + ... + 105398406.

It is an arithmetic number, because the mean of its divisors is an integer number (56913457680).

Almost surely, 2^656612666045 is an apocalyptic number.

It is an amenable number.

656612666045 is a deficient number, since it is larger than the sum of its proper divisors (254002656835).

656612666045 is a wasteful number, since it uses less digits than its factorization.

656612666045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210790684.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 656612666045 in words is "six hundred fifty-six billion, six hundred twelve million, six hundred sixty-six thousand, forty-five".