66908323 has 4 divisors (see below), whose sum is σ = 69066688. Its totient is φ = 64749960.

The previous prime is 66908287. The next prime is 66908363. The reversal of 66908323 is 32380966.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66908323 - 2¹⁷ = 66777251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66908363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079136 + ... + 1079197.

It is an arithmetic number, because the mean of its divisors is an integer number (17266672).

Almost surely, 2^66908323 is an apocalyptic number.

66908323 is a deficient number, since it is larger than the sum of its proper divisors (2158365).

66908323 is a wasteful number, since it uses less digits than its factorization.

66908323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158364.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 66908323 is about 8179.7507908249. The cubic root of 66908323 is about 405.9694764599.

The spelling of 66908323 in words is "sixty-six million, nine hundred eight thousand, three hundred twenty-three".