166163431 has 8 divisors (see below), whose sum is σ = 198157824. Its totient is φ = 136233240.

The previous prime is 166163429. The next prime is 166163453. The reversal of 166163431 is 134361661.

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

It is a cyclic number.

It is not a de Polignac number, because 166163431 - 2¹ = 166163429 is a prime.

It is a super-2 number, since 2×166163431² = 55220571603383522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166163393 and 166163402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166166431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515875 + ... + 516196.

It is an arithmetic number, because the mean of its divisors is an integer number (24769728).

Almost surely, 2^166163431 is an apocalyptic number.

166163431 is a deficient number, since it is larger than the sum of its proper divisors (31994393).

166163431 is a wasteful number, since it uses less digits than its factorization.

166163431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032101.

The product of its digits is 7776, while the sum is 31.

The square root of 166163431 is about 12890.4395192716. The cubic root of 166163431 is about 549.7667672251.

The spelling of 166163431 in words is "one hundred sixty-six million, one hundred sixty-three thousand, four hundred thirty-one".