66764 has 6 divisors (see below), whose sum is σ = 116844. Its totient is φ = 33380.

The previous prime is 66763. The next prime is 66791. The reversal of 66764 is 46766.

It is not an unprimeable number, because it can be changed into a prime (66763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342 + ... + 8349.

It is an arithmetic number, because the mean of its divisors is an integer number (19474).

2⁶⁶⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

66764 is a deficient number, since it is larger than the sum of its proper divisors (50080).

66764 is a wasteful number, since it uses less digits than its factorization.

66764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695 (or 16693 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 66764 is about 258.3873061898. The cubic root of 66764 is about 40.5677370745.

The spelling of 66764 in words is "sixty-six thousand, seven hundred sixty-four".