126661376477 has 16 divisors (see below), whose sum is σ = 130441658880. Its totient is φ = 122946595200.

The previous prime is 126661376467. The next prime is 126661376483. The reversal of 126661376477 is 774673166621.

It is a cyclic number.

It is not a de Polignac number, because 126661376477 - 2¹² = 126661372381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126661376447) 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, 1758227 + ... + 1828847.

It is an arithmetic number, because the mean of its divisors is an integer number (8152603680).

Almost surely, 2^126661376477 is an apocalyptic number.

It is an amenable number.

126661376477 is a deficient number, since it is larger than the sum of its proper divisors (3780282403).

126661376477 is an equidigital number, since it uses as much as digits as its factorization.

126661376477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71084.

The product of its digits is 10668672, while the sum is 56.

The spelling of 126661376477 in words is "one hundred twenty-six billion, six hundred sixty-one million, three hundred seventy-six thousand, four hundred seventy-seven".