66726999 has 12 divisors (see below), whose sum is σ = 99707400. Its totient is φ = 42950544.

The previous prime is 66726983. The next prime is 66727009. The reversal of 66726999 is 99962766.

It is a happy number.

It is not a de Polignac number, because 66726999 - 2⁴ = 66726983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66726199) 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, 127569 + ... + 128090.

It is an arithmetic number, because the mean of its divisors is an integer number (8308950).

Almost surely, 2^66726999 is an apocalyptic number.

66726999 is a deficient number, since it is larger than the sum of its proper divisors (32980401).

66726999 is a wasteful number, since it uses less digits than its factorization.

66726999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255694 (or 255691 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 66726999 is about 8168.6595595606. The cubic root of 66726999 is about 405.6024139709.

The spelling of 66726999 in words is "sixty-six million, seven hundred twenty-six thousand, nine hundred ninety-nine".