66090672 has 30 divisors (see below), whose sum is σ = 184962492. Its totient is φ = 22030176.

The previous prime is 66090643. The next prime is 66090691. The reversal of 66090672 is 27609066.

It is a super-3 number, since 3×66090672³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229338 + ... + 229625.

Almost surely, 2^66090672 is an apocalyptic number.

It is an amenable number.

66090672 is an abundant number, since it is smaller than the sum of its proper divisors (118871820).

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

66090672 is a wasteful number, since it uses less digits than its factorization.

66090672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458977 (or 458968 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 66090672 is about 8129.6169651466. The cubic root of 66090672 is about 404.3089816792.

The spelling of 66090672 in words is "sixty-six million, ninety thousand, six hundred seventy-two".