66522043 has 4 divisors (see below), whose sum is σ = 76025200. Its totient is φ = 57018888.

The previous prime is 66522031. The next prime is 66522091. The reversal of 66522043 is 34022566.

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 66522043 - 2⁵ = 66522011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66523043) 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, 4751568 + ... + 4751581.

It is an arithmetic number, because the mean of its divisors is an integer number (19006300).

Almost surely, 2^66522043 is an apocalyptic number.

66522043 is a deficient number, since it is larger than the sum of its proper divisors (9503157).

66522043 is an equidigital number, since it uses as much as digits as its factorization.

66522043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503156.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66522043 is about 8156.1046462144. The cubic root of 66522043 is about 405.1867106387.

The spelling of 66522043 in words is "sixty-six million, five hundred twenty-two thousand, forty-three".