66339768 has 32 divisors (see below), whose sum is σ = 180927360. Its totient is φ = 20102880.

The previous prime is 66339743. The next prime is 66339769. The reversal of 66339768 is 86793366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66339769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125380 + ... + 125907.

It is an arithmetic number, because the mean of its divisors is an integer number (5653980).

Almost surely, 2^66339768 is an apocalyptic number.

It is an amenable number.

66339768 is an abundant number, since it is smaller than the sum of its proper divisors (114587592).

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

66339768 is a wasteful number, since it uses less digits than its factorization.

66339768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251307 (or 251303 counting only the distinct ones).

The product of its digits is 979776, while the sum is 48.

The square root of 66339768 is about 8144.9228357302. The cubic root of 66339768 is about 404.8162922354.

The spelling of 66339768 in words is "sixty-six million, three hundred thirty-nine thousand, seven hundred sixty-eight".