126660740651 has 6 divisors (see below), whose sum is σ = 134549645220. Its totient is φ = 119210108576.

The previous prime is 126660740641. The next prime is 126660740681. The reversal of 126660740651 is 156047066621.

It is a de Polignac number, because none of the positive numbers 2^k-126660740651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126660740641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219135941 + ... + 219136518.

It is an arithmetic number, because the mean of its divisors is an integer number (22424940870).

Almost surely, 2^126660740651 is an apocalyptic number.

126660740651 is a deficient number, since it is larger than the sum of its proper divisors (7888904569).

126660740651 is an equidigital number, since it uses as much as digits as its factorization.

126660740651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438272493 (or 438272476 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 126660740651 in words is "one hundred twenty-six billion, six hundred sixty million, seven hundred forty thousand, six hundred fifty-one".