166143399 has 16 divisors (see below), whose sum is σ = 224985600. Its totient is φ = 109040256.

The previous prime is 166143377. The next prime is 166143413. The reversal of 166143399 is 993341661.

It is not a de Polignac number, because 166143399 - 2¹⁵ = 166110631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166143399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166143319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101812 + ... + 103430.

It is an arithmetic number, because the mean of its divisors is an integer number (14061600).

Almost surely, 2^166143399 is an apocalyptic number.

166143399 is a deficient number, since it is larger than the sum of its proper divisors (58842201).

166143399 is a wasteful number, since it uses less digits than its factorization.

166143399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its digits is 104976, while the sum is 42.

The square root of 166143399 is about 12889.6624858838. The cubic root of 166143399 is about 549.7446737749.

The spelling of 166143399 in words is "one hundred sixty-six million, one hundred forty-three thousand, three hundred ninety-nine".