1666964 has 12 divisors (see below), whose sum is σ = 3141684. Its totient is φ = 769344.

The previous prime is 1666943. The next prime is 1666991. The reversal of 1666964 is 4696661.

It can be written as a sum of positive squares in 2 ways, for example, as 1119364 + 547600 = 1058^2 + 740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15977 + ... + 16080.

It is an arithmetic number, because the mean of its divisors is an integer number (261807).

2^1666964 is an apocalyptic number.

It is an amenable number.

1666964 is a deficient number, since it is larger than the sum of its proper divisors (1474720).

1666964 is a wasteful number, since it uses less digits than its factorization.

1666964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32074 (or 32072 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 1666964 is about 1291.1096003051. The cubic root of 1666964 is about 118.5701602834.

The spelling of 1666964 in words is "one million, six hundred sixty-six thousand, nine hundred sixty-four".