66575244 has 24 divisors (see below), whose sum is σ = 156245040. Its totient is φ = 22062784.

The previous prime is 66575237. The next prime is 66575263. The reversal of 66575244 is 44257566.

It is a super-2 number, since 2×66575244² = 8864526227319072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13959 + ... + 18110.

It is an arithmetic number, because the mean of its divisors is an integer number (6510210).

Almost surely, 2^66575244 is an apocalyptic number.

It is an amenable number.

66575244 is an abundant number, since it is smaller than the sum of its proper divisors (89669796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66575244 is a wasteful number, since it uses less digits than its factorization.

66575244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32249 (or 32247 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The square root of 66575244 is about 8159.3654165015. The cubic root of 66575244 is about 405.2946978723.

The spelling of 66575244 in words is "sixty-six million, five hundred seventy-five thousand, two hundred forty-four".