2749666 has 4 divisors (see below), whose sum is σ = 4124502. Its totient is φ = 1374832.

The previous prime is 2749639. The next prime is 2749667. The reversal of 2749666 is 6669472.

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., 1615441 + 1134225 = 1271^2 + 1065^2 .

It is a super-2 number, since 2×2749666² = 15121326223112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2749667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687415 + ... + 687418.

2^2749666 is an apocalyptic number.

2749666 is a deficient number, since it is larger than the sum of its proper divisors (1374836).

2749666 is a wasteful number, since it uses less digits than its factorization.

2749666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374835.

The product of its digits is 108864, while the sum is 40.

The square root of 2749666 is about 1658.2116873307. The cubic root of 2749666 is about 140.0962942962.

The spelling of 2749666 in words is "two million, seven hundred forty-nine thousand, six hundred sixty-six".