66992 has 20 divisors (see below), whose sum is σ = 133920.
Its totient is φ = 32448.
The previous prime is 66977. The next prime is 67003. The reversal of 66992 is 29966.
It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.
Together with 66928 it forms an amicable pair
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66992.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809 + ... + 887.
It is an arithmetic number, because the mean of its divisors is an integer number (6696).
266992 is an apocalyptic number.
It is an amenable number.
66992 is a deficient number, since it is larger than the sum of its proper divisors (66928).
66992 is a wasteful number, since it uses less digits than its factorization.
66992 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 140 (or 134 counting only the distinct ones).
The product of its digits is 5832, while the sum is 32.
The square root of 66992 is about 258.8281283014.
The cubic root of 66992 is about 40.6138644036.
The spelling of 66992 in words is "sixty-six thousand, nine hundred ninety-two".