5615866 has 4 divisors (see below), whose sum is σ = 8423802. Its totient is φ = 2807932.

The previous prime is 5615861. The next prime is 5615881. The reversal of 5615866 is 6685165.

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., 3980025 + 1635841 = 1995^2 + 1279^2 .

It is not an unprimeable number, because it can be changed into a prime (5615861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403965 + ... + 1403968.

Almost surely, 2^5615866 is an apocalyptic number.

5615866 is a deficient number, since it is larger than the sum of its proper divisors (2807936).

5615866 is a wasteful number, since it uses less digits than its factorization.

5615866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807935.

The product of its digits is 43200, while the sum is 37.

The square root of 5615866 is about 2369.7818464998. The cubic root of 5615866 is about 177.7483503664.

The spelling of 5615866 in words is "five million, six hundred fifteen thousand, eight hundred sixty-six".