2939666 has 4 divisors (see below), whose sum is σ = 4409502. Its totient is φ = 1469832.

The previous prime is 2939663. The next prime is 2939683. The reversal of 2939666 is 6669392.

2939666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2544025 + 395641 = 1595^2 + 629^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2939663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734915 + ... + 734918.

2^2939666 is an apocalyptic number.

2939666 is a deficient number, since it is larger than the sum of its proper divisors (1469836).

2939666 is a wasteful number, since it uses less digits than its factorization.

2939666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469835.

The product of its digits is 104976, while the sum is 41.

The square root of 2939666 is about 1714.5454208040. The cubic root of 2939666 is about 143.2515500037.

The spelling of 2939666 in words is "two million, nine hundred thirty-nine thousand, six hundred sixty-six".