2042666 has 4 divisors (see below), whose sum is σ = 3064002. Its totient is φ = 1021332.

The previous prime is 2042657. The next prime is 2042681. The reversal of 2042666 is 6662402.

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., 2042041 + 625 = 1429^2 + 25^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510665 + ... + 510668.

2^2042666 is an apocalyptic number.

2042666 is a deficient number, since it is larger than the sum of its proper divisors (1021336).

2042666 is a wasteful number, since it uses less digits than its factorization.

2042666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021335.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2042666 is about 1429.2186676643. The cubic root of 2042666 is about 126.8817383400.

The spelling of 2042666 in words is "two million, forty-two thousand, six hundred sixty-six".