66522617 has 4 divisors (see below), whose sum is σ = 76025856. Its totient is φ = 57019380.

The previous prime is 66522611. The next prime is 66522619. The reversal of 66522617 is 71622566.

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 66522617 - 2²⁰ = 65474041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66522611) 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, 4751609 + ... + 4751622.

It is an arithmetic number, because the mean of its divisors is an integer number (19006464).

Almost surely, 2^66522617 is an apocalyptic number.

It is an amenable number.

66522617 is a deficient number, since it is larger than the sum of its proper divisors (9503239).

66522617 is an equidigital number, since it uses as much as digits as its factorization.

66522617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503238.

The product of its digits is 30240, while the sum is 35.

The square root of 66522617 is about 8156.1398345050. The cubic root of 66522617 is about 405.1878760494.

The spelling of 66522617 in words is "sixty-six million, five hundred twenty-two thousand, six hundred seventeen".