60664221 has 12 divisors (see below), whose sum is σ = 90871872. Its totient is φ = 40442652.

The previous prime is 60664193. The next prime is 60664223. The reversal of 60664221 is 12246606.

It is a happy number.

It is not a de Polignac number, because 60664221 - 2⁵ = 60664189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60664223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124581 + ... + 125066.

It is an arithmetic number, because the mean of its divisors is an integer number (7572656).

Almost surely, 2^60664221 is an apocalyptic number.

It is an amenable number.

60664221 is a deficient number, since it is larger than the sum of its proper divisors (30207651).

60664221 is an equidigital number, since it uses as much as digits as its factorization.

60664221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249662 (or 249650 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 60664221 is about 7788.7239648096. The cubic root of 60664221 is about 392.9260976357.

The spelling of 60664221 in words is "sixty million, six hundred sixty-four thousand, two hundred twenty-one".