126664505 has 32 divisors (see below), whose sum is σ = 173024640. Its totient is φ = 88197120.

The previous prime is 126664493. The next prime is 126664523. The reversal of 126664505 is 505466621.

It is not a de Polignac number, because 126664505 - 2⁶ = 126664441 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135881 + ... + 136809.

It is an arithmetic number, because the mean of its divisors is an integer number (5407020).

Almost surely, 2^126664505 is an apocalyptic number.

It is an amenable number.

126664505 is a deficient number, since it is larger than the sum of its proper divisors (46360135).

126664505 is a wasteful number, since it uses less digits than its factorization.

126664505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 126664505 is about 11254.5326424512. The cubic root of 126664505 is about 502.2095612945.

It can be divided in two parts, 12666 and 4505, that added together give a palindrome (17171).

The spelling of 126664505 in words is "one hundred twenty-six million, six hundred sixty-four thousand, five hundred five".