1611664 has 20 divisors (see below), whose sum is σ = 3142656. Its totient is φ = 800672.

The previous prime is 1611613. The next prime is 1611667. The reversal of 1611664 is 4661161.

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 3 ways as a sum of consecutive naturals, for example, 4017 + ... + 4399.

2^1611664 is an apocalyptic number.

It is an amenable number.

1611664 is a deficient number, since it is larger than the sum of its proper divisors (1530992).

1611664 is a wasteful number, since it uses less digits than its factorization.

1611664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 648 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 1611664 is about 1269.5132925653. The cubic root of 1611664 is about 117.2442361950.

It can be divided in two parts, 16 and 11664, that multiplied together give a square (186624 = 432²).

The spelling of 1611664 in words is "one million, six hundred eleven thousand, six hundred sixty-four".