166143465 has 48 divisors (see below), whose sum is σ = 315478800. Its totient is φ = 80510976.

The previous prime is 166143437. The next prime is 166143487. The reversal of 166143465 is 564341661.

It is a happy number.

166143465 is a `hidden beast` number, since 1 + 6 + 614 + 34 + 6 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1354896 + 164788569 = 1164^2 + 12837^2 .

It is not a de Polignac number, because 166143465 - 2⁵ = 166143433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18441 + ... + 25929.

It is an arithmetic number, because the mean of its divisors is an integer number (6572475).

Almost surely, 2^166143465 is an apocalyptic number.

166143465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166143465 is a deficient number, since it is larger than the sum of its proper divisors (149335335).

166143465 is a wasteful number, since it uses less digits than its factorization.

166143465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7546 (or 7543 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166143465 is about 12889.6650460747. The cubic root of 166143465 is about 549.7447465697.

The spelling of 166143465 in words is "one hundred sixty-six million, one hundred forty-three thousand, four hundred sixty-five".