66853900 has 18 divisors (see below), whose sum is σ = 145073180. Its totient is φ = 26741520.

The previous prime is 66853889. The next prime is 66853907. The reversal of 66853900 is 935866.

66853900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66853900.

It is not an unprimeable number, because it can be changed into a prime (66853907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334170 + ... + 334369.

Almost surely, 2^66853900 is an apocalyptic number.

It is an amenable number.

66853900 is an abundant number, since it is smaller than the sum of its proper divisors (78219280).

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

66853900 is a wasteful number, since it uses less digits than its factorization.

66853900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668553 (or 668546 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 66853900 is about 8176.4234234780. The cubic root of 66853900 is about 405.8593752102.

It can be divided in two parts, 6685 and 3900, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 66853900 in words is "sixty-six million, eight hundred fifty-three thousand, nine hundred".