126766557 has 12 divisors (see below), whose sum is σ = 183771900. Its totient is φ = 84204288.

The previous prime is 126766543. The next prime is 126766559. The reversal of 126766557 is 755667621.

126766557 is a `hidden beast` number, since 1 + 26 + 76 + 6 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51753636 + 75012921 = 7194^2 + 8661^2 .

It is not a de Polignac number, because 126766557 - 2⁷ = 126766429 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22932 + ... + 27917.

It is an arithmetic number, because the mean of its divisors is an integer number (15314325).

Almost surely, 2^126766557 is an apocalyptic number.

It is an amenable number.

126766557 is a deficient number, since it is larger than the sum of its proper divisors (57005343).

126766557 is a wasteful number, since it uses less digits than its factorization.

126766557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51132 (or 51129 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 126766557 is about 11259.0655473711. The cubic root of 126766557 is about 502.3443997327.

The spelling of 126766557 in words is "one hundred twenty-six million, seven hundred sixty-six thousand, five hundred fifty-seven".