126766556 has 48 divisors (see below), whose sum is σ = 268262400. Its totient is φ = 51202368.

The previous prime is 126766543. The next prime is 126766559. The reversal of 126766556 is 655667621.

It is a super-2 number, since 2×126766556² = 32139519440202272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126766559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126650 + ... + 127646.

It is an arithmetic number, because the mean of its divisors is an integer number (5588800).

Almost surely, 2^126766556 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 126766556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134131200).

126766556 is an abundant number, since it is smaller than the sum of its proper divisors (141495844).

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

126766556 is a wasteful number, since it uses less digits than its factorization.

126766556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1264 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 126766556 is about 11259.0655029625. The cubic root of 126766556 is about 502.3443984118.

The spelling of 126766556 in words is "one hundred twenty-six million, seven hundred sixty-six thousand, five hundred fifty-six".