366115813 has 4 divisors (see below), whose sum is σ = 418418080. Its totient is φ = 313813548.

The previous prime is 366115747. The next prime is 366115837. The reversal of 366115813 is 318511663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 366115813 - 2²⁵ = 332561381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366115843) 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, 26151123 + ... + 26151136.

It is an arithmetic number, because the mean of its divisors is an integer number (104604520).

Almost surely, 2^366115813 is an apocalyptic number.

It is an amenable number.

366115813 is a deficient number, since it is larger than the sum of its proper divisors (52302267).

366115813 is an equidigital number, since it uses as much as digits as its factorization.

366115813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52302266.

The product of its digits is 12960, while the sum is 34.

The square root of 366115813 is about 19134.1530515463. The cubic root of 366115813 is about 715.3844497099.

It can be divided in two parts, 36611 and 5813, that added together give a palindrome (42424).

The spelling of 366115813 in words is "three hundred sixty-six million, one hundred fifteen thousand, eight hundred thirteen".