145166818 has 4 divisors (see below), whose sum is σ = 217750230. Its totient is φ = 72583408.

The previous prime is 145166797. The next prime is 145166849. The reversal of 145166818 is 818661541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83119689 + 62047129 = 9117^2 + 7877^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36291703 + ... + 36291706.

Almost surely, 2^145166818 is an apocalyptic number.

145166818 is a deficient number, since it is larger than the sum of its proper divisors (72583412).

145166818 is an equidigital number, since it uses as much as digits as its factorization.

145166818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72583411.

The product of its digits is 46080, while the sum is 40.

The square root of 145166818 is about 12048.5193281166. The cubic root of 145166818 is about 525.5601796973.

The spelling of 145166818 in words is "one hundred forty-five million, one hundred sixty-six thousand, eight hundred eighteen".