66207898 has 8 divisors (see below), whose sum is σ = 99528660. Its totient is φ = 33031680.

The previous prime is 66207893. The next prime is 66207919. The reversal of 66207898 is 89870266.

It can be written as a sum of positive squares in 2 ways, for example, as 60171049 + 6036849 = 7757^2 + 2457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66207893) 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, 34983 + ... + 36826.

Almost surely, 2^66207898 is an apocalyptic number.

66207898 is a deficient number, since it is larger than the sum of its proper divisors (33320762).

66207898 is a wasteful number, since it uses less digits than its factorization.

66207898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72272.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 66207898 is about 8136.8235817179. The cubic root of 66207898 is about 404.5478834222.

The spelling of 66207898 in words is "sixty-six million, two hundred seven thousand, eight hundred ninety-eight".