83151666 has 48 divisors (see below), whose sum is σ = 194889240. Its totient is φ = 25470720.

The previous prime is 83151661. The next prime is 83151683. The reversal of 83151666 is 66615138.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56927025 + 26224641 = 7545^2 + 5121^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 83151666.

It is not an unprimeable number, because it can be changed into a prime (83151661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62286 + ... + 63606.

Almost surely, 2^83151666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83151666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97444620).

83151666 is an abundant number, since it is smaller than the sum of its proper divisors (111737574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83151666 is a wasteful number, since it uses less digits than its factorization.

83151666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1608 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 83151666 is about 9118.7535332413. The cubic root of 83151666 is about 436.4725993751.

The spelling of 83151666 in words is "eighty-three million, one hundred fifty-one thousand, six hundred sixty-six".