3139666 has 4 divisors (see below), whose sum is σ = 4709502. Its totient is φ = 1569832.

The previous prime is 3139663. The next prime is 3139673. The reversal of 3139666 is 6669313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 531441 = 1615^2 + 729^2 .

It is not an unprimeable number, because it can be changed into a prime (3139663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784915 + ... + 784918.

Almost surely, 2^3139666 is an apocalyptic number.

3139666 is a deficient number, since it is larger than the sum of its proper divisors (1569836).

3139666 is a wasteful number, since it uses less digits than its factorization.

3139666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569835.

The product of its digits is 17496, while the sum is 34.

The square root of 3139666 is about 1771.9102686084. The cubic root of 3139666 is about 146.4292428172.

The spelling of 3139666 in words is "three million, one hundred thirty-nine thousand, six hundred sixty-six".