126667664 has 10 divisors (see below), whose sum is σ = 245418630. Its totient is φ = 63333824.

The previous prime is 126667633. The next prime is 126667669. The reversal of 126667664 is 466766621.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 1227664 = 11200^2 + 1108^2 .

It is not an unprimeable number, because it can be changed into a prime (126667669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3958349 + ... + 3958380.

It is an arithmetic number, because the mean of its divisors is an integer number (24541863).

Almost surely, 2^126667664 is an apocalyptic number.

It is an amenable number.

126667664 is a deficient number, since it is larger than the sum of its proper divisors (118750966).

126667664 is an equidigital number, since it uses as much as digits as its factorization.

126667664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916737 (or 7916731 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 126667664 is about 11254.6729850316. The cubic root of 126667664 is about 502.2137362784.

The spelling of 126667664 in words is "one hundred twenty-six million, six hundred sixty-seven thousand, six hundred sixty-four".