66126717 has 12 divisors (see below), whose sum is σ = 96052320. Its totient is φ = 43837128.

The previous prime is 66126701. The next prime is 66126769. The reversal of 66126717 is 71762166.

It is not a de Polignac number, because 66126717 - 2⁴ = 66126701 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (66126917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18913 + ... + 22134.

It is an arithmetic number, because the mean of its divisors is an integer number (8004360).

Almost surely, 2^66126717 is an apocalyptic number.

It is an amenable number.

66126717 is a deficient number, since it is larger than the sum of its proper divisors (29925603).

66126717 is a wasteful number, since it uses less digits than its factorization.

66126717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41232 (or 41229 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 66126717 is about 8131.8335570768. The cubic root of 66126717 is about 404.3824699554.

The spelling of 66126717 in words is "sixty-six million, one hundred twenty-six thousand, seven hundred seventeen".