126877661 has 2 divisors, whose sum is σ = 126877662. Its totient is φ = 126877660.

The previous prime is 126877633. The next prime is 126877693. The reversal of 126877661 is 166778621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 26977636 = 9995^2 + 5194^2 .

It is a cyclic number.

It is not a de Polignac number, because 126877661 - 2¹⁰ = 126876637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126877631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63438830 + 63438831.

It is an arithmetic number, because the mean of its divisors is an integer number (63438831).

Almost surely, 2^126877661 is an apocalyptic number.

It is an amenable number.

126877661 is a deficient number, since it is larger than the sum of its proper divisors (1).

126877661 is an equidigital number, since it uses as much as digits as its factorization.

126877661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 126877661 is about 11263.9984463777. The cubic root of 126877661 is about 502.4911160694.

The spelling of 126877661 in words is "one hundred twenty-six million, eight hundred seventy-seven thousand, six hundred sixty-one".