656814233666 has 16 divisors (see below), whose sum is σ = 997134171264. Its totient is φ = 324436515504.

The previous prime is 656814233653. The next prime is 656814233693. The reversal of 656814233666 is 666332418656.

It is a super-4 number, since 4×656814233666⁴ (a number of 48 digits) contains 4444 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4574480 + ... + 4715876.

It is an arithmetic number, because the mean of its divisors is an integer number (62320885704).

Almost surely, 2^656814233666 is an apocalyptic number.

656814233666 is a deficient number, since it is larger than the sum of its proper divisors (340319937598).

656814233666 is a wasteful number, since it uses less digits than its factorization.

656814233666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169465.

The product of its digits is 22394880, while the sum is 56.

The spelling of 656814233666 in words is "six hundred fifty-six billion, eight hundred fourteen million, two hundred thirty-three thousand, six hundred sixty-six".