2005246666 has 4 divisors (see below), whose sum is σ = 3007870002. Its totient is φ = 1002623332.

The previous prime is 2005246631. The next prime is 2005246693. The reversal of 2005246666 is 6666425002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6666425002 = 2 ⋅3333212501.

It can be written as a sum of positive squares in only one way, i.e., 1522170225 + 483076441 = 39015^2 + 21979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501311665 + ... + 501311668.

Almost surely, 2^2005246666 is an apocalyptic number.

2005246666 is a deficient number, since it is larger than the sum of its proper divisors (1002623336).

2005246666 is a wasteful number, since it uses less digits than its factorization.

2005246666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002623335.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2005246666 is about 44779.9806386738. The cubic root of 2005246666 is about 1261.0218187167.

The spelling of 2005246666 in words is "two billion, five million, two hundred forty-six thousand, six hundred sixty-six".