126565664 has 12 divisors (see below), whose sum is σ = 249176214. Its totient is φ = 63282816.

The previous prime is 126565639. The next prime is 126565687. The reversal of 126565664 is 466565621.

It can be written as a sum of positive squares in only one way, i.e., 110082064 + 16483600 = 10492^2 + 4060^2 .

It is an unprimeable number.

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, 1977557 + ... + 1977620.

Almost surely, 2^126565664 is an apocalyptic number.

It is an amenable number.

126565664 is a deficient number, since it is larger than the sum of its proper divisors (122610550).

126565664 is an equidigital number, since it uses as much as digits as its factorization.

126565664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955187 (or 3955179 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 126565664 is about 11250.1406213434. The cubic root of 126565664 is about 502.0788964001.

The spelling of 126565664 in words is "one hundred twenty-six million, five hundred sixty-five thousand, six hundred sixty-four".