656663651434 has 16 divisors (see below), whose sum is σ = 1125732472128. Its totient is φ = 281421440352.

The previous prime is 656663651419. The next prime is 656663651437. The reversal of 656663651434 is 434156366656.

It is a super-2 number, since 2×656663651434² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656663651437) 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, 250857 + ... + 1173139.

It is an arithmetic number, because the mean of its divisors is an integer number (70358279508).

Almost surely, 2^656663651434 is an apocalyptic number.

656663651434 is a deficient number, since it is larger than the sum of its proper divisors (469068820694).

656663651434 is a wasteful number, since it uses less digits than its factorization.

656663651434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973149.

The product of its digits is 27993600, while the sum is 55.

The spelling of 656663651434 in words is "six hundred fifty-six billion, six hundred sixty-three million, six hundred fifty-one thousand, four hundred thirty-four".