66798853 has 4 divisors (see below), whose sum is σ = 72871488. Its totient is φ = 60726220.

The previous prime is 66798847. The next prime is 66798857. The reversal of 66798853 is 35889766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66798853 - 2⁵ = 66798821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66798853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66798857) 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, 3036301 + ... + 3036322.

It is an arithmetic number, because the mean of its divisors is an integer number (18217872).

Almost surely, 2^66798853 is an apocalyptic number.

It is an amenable number.

66798853 is a deficient number, since it is larger than the sum of its proper divisors (6072635).

66798853 is a wasteful number, since it uses less digits than its factorization.

66798853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072634.

The product of its digits is 2177280, while the sum is 52.

The square root of 66798853 is about 8173.0565273954. The cubic root of 66798853 is about 405.7479507671.

The spelling of 66798853 in words is "sixty-six million, seven hundred ninety-eight thousand, eight hundred fifty-three".