1695664 has 20 divisors (see below), whose sum is σ = 3314520. Its totient is φ = 840320.

The previous prime is 1695653. The next prime is 1695671. The reversal of 1695664 is 4665961.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692 + ... + 2500.

It is an arithmetic number, because the mean of its divisors is an integer number (165726).

2^1695664 is an apocalyptic number.

It is an amenable number.

1695664 is a deficient number, since it is larger than the sum of its proper divisors (1618856).

1695664 is a wasteful number, since it uses less digits than its factorization.

1695664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948 (or 942 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 1695664 is about 1302.1766393236. The cubic root of 1695664 is about 119.2467633284.

It can be divided in two parts, 16956 and 64, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 1695664 in words is "one million, six hundred ninety-five thousand, six hundred sixty-four".