126661556 has 24 divisors (see below), whose sum is σ = 254204160. Its totient is φ = 54094752.

The previous prime is 126661541. The next prime is 126661603. The reversal of 126661556 is 655166621.

It is a super-2 number, since 2×126661556² = 32086299536682272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485 + ... + 15923.

It is an arithmetic number, because the mean of its divisors is an integer number (10591840).

Almost surely, 2^126661556 is an apocalyptic number.

It is an amenable number.

126661556 is an abundant number, since it is smaller than the sum of its proper divisors (127542604).

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

126661556 is a wasteful number, since it uses less digits than its factorization.

126661556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15743 (or 15741 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 126661556 is about 11254.4016278077. The cubic root of 126661556 is about 502.2056637872.

The spelling of 126661556 in words is "one hundred twenty-six million, six hundred sixty-one thousand, five hundred fifty-six".