126006660 has 72 divisors (see below), whose sum is σ = 411629400. Its totient is φ = 31016448.

The previous prime is 126006649. The next prime is 126006667. The reversal of 126006660 is 66600621.

It can be written as a sum of positive squares in 4 ways, for example, as 28708164 + 97298496 = 5358^2 + 9864^2 .

It is not an unprimeable number, because it can be changed into a prime (126006667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24585 + ... + 29264.

It is an arithmetic number, because the mean of its divisors is an integer number (5717075).

Almost surely, 2^126006660 is an apocalyptic number.

126006660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126006660 is an abundant number, since it is smaller than the sum of its proper divisors (285622740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126006660 is a wasteful number, since it uses less digits than its factorization.

126006660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53877 (or 53872 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 126006660 is about 11225.2688163803. The cubic root of 126006660 is about 501.3386262943.

The spelling of 126006660 in words is "one hundred twenty-six million, six thousand, six hundred sixty".