2540066 has 4 divisors (see below), whose sum is σ = 3810102. Its totient is φ = 1270032.

The previous prime is 2540033. The next prime is 2540071. The reversal of 2540066 is 6600452.

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., 1677025 + 863041 = 1295^2 + 929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635015 + ... + 635018.

2^2540066 is an apocalyptic number.

2540066 is a deficient number, since it is larger than the sum of its proper divisors (1270036).

2540066 is a wasteful number, since it uses less digits than its factorization.

2540066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270035.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2540066 is about 1593.7584509580. The cubic root of 2540066 is about 136.4420807376.

The spelling of 2540066 in words is "two million, five hundred forty thousand, sixty-six".