66258668 has 24 divisors (see below), whose sum is σ = 132693792. Its totient is φ = 28358784.

The previous prime is 66258613. The next prime is 66258671. The reversal of 66258668 is 86685266.

It is a happy number.

It is a super-2 number, since 2×66258668² = 8780422170268448, 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, 33680 + ... + 35592.

It is an arithmetic number, because the mean of its divisors is an integer number (5528908).

Almost surely, 2^66258668 is an apocalyptic number.

It is an amenable number.

66258668 is an abundant number, since it is smaller than the sum of its proper divisors (66435124).

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

66258668 is a wasteful number, since it uses less digits than its factorization.

66258668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161 (or 3159 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 66258668 is about 8139.9427516414. The cubic root of 66258668 is about 404.6512630742.

The spelling of 66258668 in words is "sixty-six million, two hundred fifty-eight thousand, six hundred sixty-eight".