1696666 has 8 divisors (see below), whose sum is σ = 2580084. Its totient is φ = 836640.

The previous prime is 1696657. The next prime is 1696691. The reversal of 1696666 is 6666961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1615441 + 81225 = 1271^2 + 285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5665 + ... + 5956.

2^1696666 is an apocalyptic number.

1696666 is a deficient number, since it is larger than the sum of its proper divisors (883418).

1696666 is a wasteful number, since it uses less digits than its factorization.

1696666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11696.

The product of its digits is 69984, while the sum is 40.

The square root of 1696666 is about 1302.5613229326. The cubic root of 1696666 is about 119.2702470943.

It can be divided in two parts, 16966 and 66, that multiplied together give a triangular number (1119756 = T₁₄₉₆).

The spelling of 1696666 in words is "one million, six hundred ninety-six thousand, six hundred sixty-six".