83665905 has 8 divisors (see below), whose sum is σ = 133865472. Its totient is φ = 44621808.

The previous prime is 83665867. The next prime is 83665921. The reversal of 83665905 is 50956638.

83665905 is nontrivially palindromic in base 4.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83665905 - 2⁸ = 83665649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2788849 + ... + 2788878.

It is an arithmetic number, because the mean of its divisors is an integer number (16733184).

Almost surely, 2^83665905 is an apocalyptic number.

It is an amenable number.

83665905 is a deficient number, since it is larger than the sum of its proper divisors (50199567).

83665905 is a wasteful number, since it uses less digits than its factorization.

83665905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577735.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 83665905 is about 9146.9068542322. The cubic root of 83665905 is about 437.3705173283.

The spelling of 83665905 in words is "eighty-three million, six hundred sixty-five thousand, nine hundred five".