66300857 has 4 divisors (see below), whose sum is σ = 75772416. Its totient is φ = 56829300.

The previous prime is 66300841. The next prime is 66300877. The reversal of 66300857 is 75800366.

It is a happy number.

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 66300857 - 2⁴ = 66300841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66300877) 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, 4735769 + ... + 4735782.

It is an arithmetic number, because the mean of its divisors is an integer number (18943104).

Almost surely, 2^66300857 is an apocalyptic number.

It is an amenable number.

66300857 is a deficient number, since it is larger than the sum of its proper divisors (9471559).

66300857 is an equidigital number, since it uses as much as digits as its factorization.

66300857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471558.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66300857 is about 8142.5338193955. The cubic root of 66300857 is about 404.7371296259.

The spelling of 66300857 in words is "sixty-six million, three hundred thousand, eight hundred fifty-seven".