66853377 has 16 divisors (see below), whose sum is σ = 100668160. Its totient is φ = 43837200.

The previous prime is 66853363. The next prime is 66853379. The reversal of 66853377 is 77335866.

It is not a de Polignac number, because 66853377 - 2⁸ = 66853121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66853379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18649 + ... + 21942.

It is an arithmetic number, because the mean of its divisors is an integer number (6291760).

Almost surely, 2^66853377 is an apocalyptic number.

It is an amenable number.

66853377 is a deficient number, since it is larger than the sum of its proper divisors (33814783).

66853377 is a wasteful number, since it uses less digits than its factorization.

66853377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40661 (or 40655 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 66853377 is about 8176.3914412166. The cubic root of 66853377 is about 405.8583168575.

It can be divided in two parts, 668 and 53377, that added together give a palindrome (54045).

The spelling of 66853377 in words is "sixty-six million, eight hundred fifty-three thousand, three hundred seventy-seven".