1611668 has 24 divisors (see below), whose sum is σ = 3025512. Its totient is φ = 748544.

The previous prime is 1611667. The next prime is 1611689. The reversal of 1611668 is 8661161.

It can be written as a sum of positive squares in 4 ways, for example, as 868624 + 743044 = 932^2 + 862^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1611668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9230 + ... + 9402.

It is an arithmetic number, because the mean of its divisors is an integer number (126063).

2^1611668 is an apocalyptic number.

It is an amenable number.

1611668 is a deficient number, since it is larger than the sum of its proper divisors (1413844).

1611668 is a wasteful number, since it uses less digits than its factorization.

1611668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 1611668 is about 1269.5148679712. The cubic root of 1611668 is about 117.2443331913.

The spelling of 1611668 in words is "one million, six hundred eleven thousand, six hundred sixty-eight".