126663240666 has 32 divisors (see below), whose sum is σ = 262175045760. Its totient is φ = 40747577024.

The previous prime is 126663240661. The next prime is 126663240667. The reversal of 126663240666 is 666042366621.

It is a super-2 number, since 2×126663240666² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126663240661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249931 + ... + 561953.

It is an arithmetic number, because the mean of its divisors is an integer number (8192970180).

Almost surely, 2^126663240666 is an apocalyptic number.

126663240666 is an abundant number, since it is smaller than the sum of its proper divisors (135511805094).

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

126663240666 is a wasteful number, since it uses less digits than its factorization.

126663240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314390.

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 126663240666 in words is "one hundred twenty-six billion, six hundred sixty-three million, two hundred forty thousand, six hundred sixty-six".