126665153666 has 16 divisors (see below), whose sum is σ = 190636575360. Its totient is φ = 63119969280.

The previous prime is 126665153633. The next prime is 126665153701. The reversal of 126665153666 is 666351566621.

It is a super-2 number, since 2×126665153666² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664451 + ... + 833561.

It is an arithmetic number, because the mean of its divisors is an integer number (11914785960).

Almost surely, 2^126665153666 is an apocalyptic number.

126665153666 is a deficient number, since it is larger than the sum of its proper divisors (63971421694).

126665153666 is a wasteful number, since it uses less digits than its factorization.

126665153666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170369.

The product of its digits is 6998400, while the sum is 53.

The spelling of 126665153666 in words is "one hundred twenty-six billion, six hundred sixty-five million, one hundred fifty-three thousand, six hundred sixty-six".