2799666 has 12 divisors (see below), whose sum is σ = 6065982. Its totient is φ = 933216.

The previous prime is 2799661. The next prime is 2799733. The reversal of 2799666 is 6669972.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 594441 = 1485^2 + 771^2 .

It is not an unprimeable number, because it can be changed into a prime (2799661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77751 + ... + 77786.

2^2799666 is an apocalyptic number.

2799666 is an abundant number, since it is smaller than the sum of its proper divisors (3266316).

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

2799666 is a wasteful number, since it uses less digits than its factorization.

2799666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155545 (or 155542 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 2799666 is about 1673.2202485029. The cubic root of 2799666 is about 140.9403701380.

It can be divided in two parts, 279966 and 6, that added together give a palindrome (279972).

The spelling of 2799666 in words is "two million, seven hundred ninety-nine thousand, six hundred sixty-six".