3969666 has 12 divisors (see below), whose sum is σ = 8600982. Its totient is φ = 1323216.

The previous prime is 3969659. The next prime is 3969673. The reversal of 3969666 is 6669693.

It is an interprime number because it is at equal distance from previous prime (3969659) and next prime (3969673).

It can be written as a sum of positive squares in only one way, i.e., 2187441 + 1782225 = 1479^2 + 1335^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110251 + ... + 110286.

Almost surely, 2^3969666 is an apocalyptic number.

3969666 is an abundant number, since it is smaller than the sum of its proper divisors (4631316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3969666 is a wasteful number, since it uses less digits than its factorization.

3969666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220545 (or 220542 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 3969666 is about 1992.4020678568. The cubic root of 3969666 is about 158.3378180324.

The spelling of 3969666 in words is "three million, nine hundred sixty-nine thousand, six hundred sixty-six".