66257950 has 48 divisors (see below), whose sum is σ = 137040336. Its totient is φ = 23628800.

The previous prime is 66257929. The next prime is 66258029. The reversal of 66257950 is 5975266.

66257950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 28014 + ... + 30286.

It is an arithmetic number, because the mean of its divisors is an integer number (2855007).

Almost surely, 2^66257950 is an apocalyptic number.

66257950 is an abundant number, since it is smaller than the sum of its proper divisors (70782386).

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

66257950 is a wasteful number, since it uses less digits than its factorization.

66257950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 66257950 is about 8139.8986480177. The cubic root of 66257950 is about 404.6498014256.

The spelling of 66257950 in words is "sixty-six million, two hundred fifty-seven thousand, nine hundred fifty".