66357023 has 4 divisors (see below), whose sum is σ = 66374448. Its totient is φ = 66339600.

The previous prime is 66356999. The next prime is 66357037. The reversal of 66357023 is 32075366.

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 66357023 - 2¹⁴ = 66340639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357043) 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, 278 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (16593612).

Almost surely, 2^66357023 is an apocalyptic number.

66357023 is a deficient number, since it is larger than the sum of its proper divisors (17425).

66357023 is a wasteful number, since it uses less digits than its factorization.

66357023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17424.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 66357023 is about 8145.9820156934. The cubic root of 66357023 is about 404.8513868190.

The spelling of 66357023 in words is "sixty-six million, three hundred fifty-seven thousand, twenty-three".