66923601 has 4 divisors (see below), whose sum is σ = 89231472. Its totient is φ = 44615732.

The previous prime is 66923587. The next prime is 66923617. The reversal of 66923601 is 10632966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66923601 - 2⁵ = 66923569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66923621) 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, 11153931 + ... + 11153936.

It is an arithmetic number, because the mean of its divisors is an integer number (22307868).

Almost surely, 2^66923601 is an apocalyptic number.

It is an amenable number.

66923601 is a deficient number, since it is larger than the sum of its proper divisors (22307871).

66923601 is a wasteful number, since it uses less digits than its factorization.

66923601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22307870.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 66923601 is about 8180.6846290515. The cubic root of 66923601 is about 406.0003741089. Note that the first 3 decimals are identical.

The spelling of 66923601 in words is "sixty-six million, nine hundred twenty-three thousand, six hundred one".