66528023 has 4 divisors (see below), whose sum is σ = 66586008. Its totient is φ = 66470040.

The previous prime is 66528017. The next prime is 66528031. The reversal of 66528023 is 32082566.

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 66528023 - 2¹² = 66523927 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 (66528013) 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, 27236 + ... + 29577.

It is an arithmetic number, because the mean of its divisors is an integer number (16646502).

Almost surely, 2^66528023 is an apocalyptic number.

66528023 is a deficient number, since it is larger than the sum of its proper divisors (57985).

66528023 is a wasteful number, since it uses less digits than its factorization.

66528023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57984.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 66528023 is about 8156.4712345474. The cubic root of 66528023 is about 405.1988516966.

The spelling of 66528023 in words is "sixty-six million, five hundred twenty-eight thousand, twenty-three".