1664276 has 12 divisors (see below), whose sum is σ = 2934708. Its totient is φ = 825792.

The previous prime is 1664261. The next prime is 1664279. The reversal of 1664276 is 6724661.

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 454276 = 1100^2 + 674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664279) 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, 971 + ... + 2066.

It is an arithmetic number, because the mean of its divisors is an integer number (244559).

2^1664276 is an apocalyptic number.

It is an amenable number.

1664276 is a deficient number, since it is larger than the sum of its proper divisors (1270432).

1664276 is a wasteful number, since it uses less digits than its factorization.

1664276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178 (or 3176 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 1664276 is about 1290.0682152507. The cubic root of 1664276 is about 118.5063940481.

The spelling of 1664276 in words is "one million, six hundred sixty-four thousand, two hundred seventy-six".