66900423 has 8 divisors (see below), whose sum is σ = 94447728. Its totient is φ = 41976704.

The previous prime is 66900413. The next prime is 66900437. The reversal of 66900423 is 32400966.

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

It is a cyclic number.

It is not a de Polignac number, because 66900423 - 2⁵ = 66900391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66900413) 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 7 ways as a sum of consecutive naturals, for example, 655836 + ... + 655937.

It is an arithmetic number, because the mean of its divisors is an integer number (11805966).

Almost surely, 2^66900423 is an apocalyptic number.

66900423 is a deficient number, since it is larger than the sum of its proper divisors (27547305).

66900423 is a wasteful number, since it uses less digits than its factorization.

66900423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311793.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66900423 is about 8179.2678767723. The cubic root of 66900423 is about 405.9534979540.

The spelling of 66900423 in words is "sixty-six million, nine hundred thousand, four hundred twenty-three".