66198853 has 24 divisors (see below), whose sum is σ = 81095040. Its totient is φ = 53776800.

The previous prime is 66198829. The next prime is 66198859. The reversal of 66198853 is 35889166.

It is not a de Polignac number, because 66198853 - 2²⁵ = 32644421 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66198859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169983 + ... + 170371.

It is an arithmetic number, because the mean of its divisors is an integer number (3378960).

Almost surely, 2^66198853 is an apocalyptic number.

It is an amenable number.

66198853 is a deficient number, since it is larger than the sum of its proper divisors (14896187).

66198853 is a wasteful number, since it uses less digits than its factorization.

66198853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 570 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 66198853 is about 8136.2677561644. The cubic root of 66198853 is about 404.5294601306.

The spelling of 66198853 in words is "sixty-six million, one hundred ninety-eight thousand, eight hundred fifty-three".