126500566 has 4 divisors (see below), whose sum is σ = 189750852. Its totient is φ = 63250282.

The previous prime is 126500557. The next prime is 126500573. The reversal of 126500566 is 665005621.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31625140 + ... + 31625143.

It is an arithmetic number, because the mean of its divisors is an integer number (47437713).

Almost surely, 2^126500566 is an apocalyptic number.

126500566 is a deficient number, since it is larger than the sum of its proper divisors (63250286).

126500566 is an equidigital number, since it uses as much as digits as its factorization.

126500566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63250285.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 126500566 is about 11247.2470409430. The cubic root of 126500566 is about 501.9928015983.

The spelling of 126500566 in words is "one hundred twenty-six million, five hundred thousand, five hundred sixty-six".