2066987806 has 64 divisors (see below), whose sum is σ = 3710762496. Its totient is φ = 854323200.

The previous prime is 2066987803. The next prime is 2066987809. The reversal of 2066987806 is 6087896602.

It is an interprime number because it is at equal distance from previous prime (2066987803) and next prime (2066987809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066987803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 834586 + ... + 837058.

It is an arithmetic number, because the mean of its divisors is an integer number (57980664).

Almost surely, 2^2066987806 is an apocalyptic number.

2066987806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2066987806 is a deficient number, since it is larger than the sum of its proper divisors (1643774690).

2066987806 is a wasteful number, since it uses less digits than its factorization.

2066987806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 2066987806 is about 45464.1375811749. The cubic root of 2066987806 is about 1273.8334183460.

The spelling of 2066987806 in words is "two billion, sixty-six million, nine hundred eighty-seven thousand, eight hundred six".