1616866 has 16 divisors (see below), whose sum is σ = 2555640. Its totient is φ = 766080.

The previous prime is 1616861. The next prime is 1616891. The reversal of 1616866 is 6686161.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 342225 = 1129^2 + 585^2 .

It is a super-2 number, since 2×1616866² = 5228511323912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3310 + ... + 3766.

2^1616866 is an apocalyptic number.

1616866 is a deficient number, since it is larger than the sum of its proper divisors (938774).

1616866 is a wasteful number, since it uses less digits than its factorization.

1616866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its digits is 10368, while the sum is 34.

The square root of 1616866 is about 1271.5604586491. The cubic root of 1616866 is about 117.3702445711.

The spelling of 1616866 in words is "one million, six hundred sixteen thousand, eight hundred sixty-six".