83766811 has 4 divisors (see below), whose sum is σ = 83809000. Its totient is φ = 83724624.

The previous prime is 83766799. The next prime is 83766829. The reversal of 83766811 is 11866738.

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

It is a cyclic number.

It is not a de Polignac number, because 83766811 - 2¹⁵ = 83734043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83766211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17961 + ... + 22138.

It is an arithmetic number, because the mean of its divisors is an integer number (20952250).

Almost surely, 2^83766811 is an apocalyptic number.

83766811 is a deficient number, since it is larger than the sum of its proper divisors (42189).

83766811 is a wasteful number, since it uses less digits than its factorization.

83766811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42188.

The product of its digits is 48384, while the sum is 40.

The square root of 83766811 is about 9152.4210458217. The cubic root of 83766811 is about 437.5462782066.

The spelling of 83766811 in words is "eighty-three million, seven hundred sixty-six thousand, eight hundred eleven".