126666660656 has 10 divisors (see below), whose sum is σ = 245416655052. Its totient is φ = 63333330320.

The previous prime is 126666660649. The next prime is 126666660667. The reversal of 126666660656 is 656066666621.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3958333130 + ... + 3958333161.

Almost surely, 2^126666660656 is an apocalyptic number.

126666660656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

126666660656 is a deficient number, since it is larger than the sum of its proper divisors (118749994396).

126666660656 is an equidigital number, since it uses as much as digits as its factorization.

126666660656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7916666299 (or 7916666293 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 56.

The spelling of 126666660656 in words is "one hundred twenty-six billion, six hundred sixty-six million, six hundred sixty thousand, six hundred fifty-six".