126647664 has 80 divisors (see below), whose sum is σ = 384392064. Its totient is φ = 35424000.

The previous prime is 126647659. The next prime is 126647681. The reversal of 126647664 is 466746621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2362 + ... + 16089.

Almost surely, 2^126647664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126647664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192196032).

126647664 is an abundant number, since it is smaller than the sum of its proper divisors (257744400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126647664 is a wasteful number, since it uses less digits than its factorization.

126647664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18486 (or 18480 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 126647664 is about 11253.7844301373. The cubic root of 126647664 is about 502.1873027934.

The spelling of 126647664 in words is "one hundred twenty-six million, six hundred forty-seven thousand, six hundred sixty-four".