66329772 has 12 divisors (see below), whose sum is σ = 154769496. Its totient is φ = 22109920.

The previous prime is 66329761. The next prime is 66329773. The reversal of 66329772 is 27792366.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (66329773) 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, 2763729 + ... + 2763752.

It is an arithmetic number, because the mean of its divisors is an integer number (12897458).

Almost surely, 2^66329772 is an apocalyptic number.

It is an amenable number.

66329772 is an abundant number, since it is smaller than the sum of its proper divisors (88439724).

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

66329772 is a wasteful number, since it uses less digits than its factorization.

66329772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527488 (or 5527486 counting only the distinct ones).

The product of its digits is 190512, while the sum is 42.

The square root of 66329772 is about 8144.3091788070. The cubic root of 66329772 is about 404.7959587962.

The spelling of 66329772 in words is "sixty-six million, three hundred twenty-nine thousand, seven hundred seventy-two".