83717666 has 8 divisors (see below), whose sum is σ = 125697180. Its totient is φ = 41818608.

The previous prime is 83717663. The next prime is 83717713. The reversal of 83717666 is 66671738.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81090025 + 2627641 = 9005^2 + 1621^2 .

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

It is not an unprimeable number, because it can be changed into a prime (83717663) 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, 17441 + ... + 21716.

Almost surely, 2^83717666 is an apocalyptic number.

83717666 is a deficient number, since it is larger than the sum of its proper divisors (41979514).

83717666 is a wasteful number, since it uses less digits than its factorization.

83717666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40228.

The product of its digits is 254016, while the sum is 44.

The square root of 83717666 is about 9149.7358431815. The cubic root of 83717666 is about 437.4606937204.

It can be divided in two parts, 8 and 3717666, that multiplied together give a triangular number (29741328 = T₇₇₁₂).

The spelling of 83717666 in words is "eighty-three million, seven hundred seventeen thousand, six hundred sixty-six".