660220567 has 4 divisors (see below), whose sum is σ = 660376456. Its totient is φ = 660064680.

The previous prime is 660220553. The next prime is 660220571. The reversal of 660220567 is 765022066.

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 660220567 - 2¹⁵ = 660187799 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 (660220597) 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, 71409 + ... + 80122.

It is an arithmetic number, because the mean of its divisors is an integer number (165094114).

Almost surely, 2^660220567 is an apocalyptic number.

660220567 is a deficient number, since it is larger than the sum of its proper divisors (155889).

660220567 is a wasteful number, since it uses less digits than its factorization.

660220567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155888.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 660220567 is about 25694.7575781520. The cubic root of 660220567 is about 870.7557475033.

The spelling of 660220567 in words is "six hundred sixty million, two hundred twenty thousand, five hundred sixty-seven".