83791066 has 4 divisors (see below), whose sum is σ = 125686602. Its totient is φ = 41895532.

The previous prime is 83791049. The next prime is 83791067. The reversal of 83791066 is 66019738.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57320041 + 26471025 = 7571^2 + 5145^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (83791067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20947765 + ... + 20947768.

Almost surely, 2^83791066 is an apocalyptic number.

83791066 is a deficient number, since it is larger than the sum of its proper divisors (41895536).

83791066 is a wasteful number, since it uses less digits than its factorization.

83791066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41895535.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 83791066 is about 9153.7460091484. The cubic root of 83791066 is about 437.5885051964.

The spelling of 83791066 in words is "eighty-three million, seven hundred ninety-one thousand, sixty-six".