66889832 has 16 divisors (see below), whose sum is σ = 132796260. Its totient is φ = 31477504.

The previous prime is 66889831. The next prime is 66889841. The reversal of 66889832 is 23898866.

It can be written as a sum of positive squares in 2 ways, for example, as 56942116 + 9947716 = 7546^2 + 3154^2 .

It is not an unprimeable number, because it can be changed into a prime (66889831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245783 + ... + 246054.

Almost surely, 2^66889832 is an apocalyptic number.

It is an amenable number.

66889832 is a deficient number, since it is larger than the sum of its proper divisors (65906428).

66889832 is a wasteful number, since it uses less digits than its factorization.

66889832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491860 (or 491856 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 66889832 is about 8178.6204215626. The cubic root of 66889832 is about 405.9320746695.

The spelling of 66889832 in words is "sixty-six million, eight hundred eighty-nine thousand, eight hundred thirty-two".