66512292 has 48 divisors (see below), whose sum is σ = 193492992. Its totient is φ = 17275680.

The previous prime is 66512269. The next prime is 66512309. The reversal of 66512292 is 29221566.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35068 + ... + 36915.

It is an arithmetic number, because the mean of its divisors is an integer number (4031104).

Almost surely, 2^66512292 is an apocalyptic number.

It is an amenable number.

66512292 is an abundant number, since it is smaller than the sum of its proper divisors (126980700).

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

66512292 is a wasteful number, since it uses less digits than its factorization.

66512292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72008 (or 72006 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 66512292 is about 8155.5068512018. The cubic root of 66512292 is about 405.1669118447.

The spelling of 66512292 in words is "sixty-six million, five hundred twelve thousand, two hundred ninety-two".