83666611 has 4 divisors (see below), whose sum is σ = 95618992. Its totient is φ = 71714232.

The previous prime is 83666599. The next prime is 83666621. The reversal of 83666611 is 11666638.

It is a happy number.

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 83666611 - 2⁵ = 83666579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83666621) 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, 5976180 + ... + 5976193.

It is an arithmetic number, because the mean of its divisors is an integer number (23904748).

Almost surely, 2^83666611 is an apocalyptic number.

83666611 is a deficient number, since it is larger than the sum of its proper divisors (11952381).

83666611 is a wasteful number, since it uses less digits than its factorization.

83666611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952380.

The product of its digits is 31104, while the sum is 37.

The square root of 83666611 is about 9146.9454464318. The cubic root of 83666611 is about 437.3717475495.

The spelling of 83666611 in words is "eighty-three million, six hundred sixty-six thousand, six hundred eleven".