66231672 has 32 divisors (see below), whose sum is σ = 178316880. Its totient is φ = 20378880.

The previous prime is 66231647. The next prime is 66231713. The reversal of 66231672 is 27613266.

It is a congruent number.

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, 105829 + ... + 106452.

Almost surely, 2^66231672 is an apocalyptic number.

It is an amenable number.

66231672 is an abundant number, since it is smaller than the sum of its proper divisors (112085208).

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

66231672 is a wasteful number, since it uses less digits than its factorization.

66231672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212303 (or 212299 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 66231672 is about 8138.2843400805. The cubic root of 66231672 is about 404.5962994507.

The spelling of 66231672 in words is "sixty-six million, two hundred thirty-one thousand, six hundred seventy-two".