83818661 has 4 divisors (see below), whose sum is σ = 83856000. Its totient is φ = 83781324.

The previous prime is 83818627. The next prime is 83818663. The reversal of 83818661 is 16681838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83818661 - 2²² = 79624357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83818663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15071 + ... + 19868.

It is an arithmetic number, because the mean of its divisors is an integer number (20964000).

Almost surely, 2^83818661 is an apocalyptic number.

It is an amenable number.

83818661 is a deficient number, since it is larger than the sum of its proper divisors (37339).

83818661 is a wasteful number, since it uses less digits than its factorization.

83818661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37338.

The product of its digits is 55296, while the sum is 41.

The square root of 83818661 is about 9155.2531914743. The cubic root of 83818661 is about 437.6365370851.

The spelling of 83818661 in words is "eighty-three million, eight hundred eighteen thousand, six hundred sixty-one".