1616660 has 12 divisors (see below), whose sum is σ = 3395028. Its totient is φ = 646656.

The previous prime is 1616651. The next prime is 1616669. The reversal of 1616660 is 666161.

It is an interprime number because it is at equal distance from previous prime (1616651) and next prime (1616669).

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 917764 = 836^2 + 958^2 .

It is a super-2 number, since 2×1616660² = 5227179111200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616669) 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, 40397 + ... + 40436.

It is an arithmetic number, because the mean of its divisors is an integer number (282919).

2^1616660 is an apocalyptic number.

1616660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616660 is an abundant number, since it is smaller than the sum of its proper divisors (1778368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616660 is a wasteful number, since it uses less digits than its factorization.

1616660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80842 (or 80840 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1616660 is about 1271.4794532355. The cubic root of 1616660 is about 117.3652597636.

The spelling of 1616660 in words is "one million, six hundred sixteen thousand, six hundred sixty".