126666535 has 8 divisors (see below), whose sum is σ = 152071920. Its totient is φ = 101285184.

The previous prime is 126666523. The next prime is 126666557. The reversal of 126666535 is 535666621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126666535 is a prime.

It is a super-2 number, since 2×126666535² = 32088822177812450, 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, 9004 + ... + 18286.

It is an arithmetic number, because the mean of its divisors is an integer number (19008990).

Almost surely, 2^126666535 is an apocalyptic number.

126666535 is a deficient number, since it is larger than the sum of its proper divisors (25405385).

126666535 is an equidigital number, since it uses as much as digits as its factorization.

126666535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12017.

The product of its digits is 194400, while the sum is 40.

The square root of 126666535 is about 11254.6228279761. The cubic root of 126666535 is about 502.2122441823.

The spelling of 126666535 in words is "one hundred twenty-six million, six hundred sixty-six thousand, five hundred thirty-five".