366521845 has 4 divisors (see below), whose sum is σ = 439826220. Its totient is φ = 293217472.

The previous prime is 366521803. The next prime is 366521893. The reversal of 366521845 is 548125663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548125663 = 31 ⋅17681473.

It can be written as a sum of positive squares in 2 ways, for example, as 192044164 + 174477681 = 13858^2 + 13209^2 .

It is a cyclic number.

It is not a de Polignac number, because 366521845 - 2²⁵ = 332967413 is a prime.

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 a junction number, because it is equal to n+sod(n) for n = 366521798 and 366521807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36652180 + ... + 36652189.

It is an arithmetic number, because the mean of its divisors is an integer number (109956555).

Almost surely, 2^366521845 is an apocalyptic number.

It is an amenable number.

366521845 is a deficient number, since it is larger than the sum of its proper divisors (73304375).

366521845 is an equidigital number, since it uses as much as digits as its factorization.

366521845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73304374.

The product of its digits is 172800, while the sum is 40.

The square root of 366521845 is about 19144.7602492170. The cubic root of 366521845 is about 715.6488120195.

The spelling of 366521845 in words is "three hundred sixty-six million, five hundred twenty-one thousand, eight hundred forty-five".