45388666 has 8 divisors (see below), whose sum is σ = 68329620. Its totient is φ = 22612128.

The previous prime is 45388631. The next prime is 45388669. The reversal of 45388666 is 66688354.

It can be written as a sum of positive squares in 2 ways, for example, as 40640625 + 4748041 = 6375^2 + 2179^2 .

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

It is not an unprimeable number, because it can be changed into a prime (45388669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40411 + ... + 41518.

Almost surely, 2^45388666 is an apocalyptic number.

45388666 is a deficient number, since it is larger than the sum of its proper divisors (22940954).

45388666 is a wasteful number, since it uses less digits than its factorization.

45388666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82208.

The product of its digits is 829440, while the sum is 46.

The square root of 45388666 is about 6737.1111019487. Note that the first 4 decimals coincide. The cubic root of 45388666 is about 356.7104285353.

The spelling of 45388666 in words is "forty-five million, three hundred eighty-eight thousand, six hundred sixty-six".