2006861786 has 8 divisors (see below), whose sum is σ = 3016208340. Its totient is φ = 1001459008.

The previous prime is 2006861777. The next prime is 2006861821. The reversal of 2006861786 is 6871686002.

It can be written as a sum of positive squares in 2 ways, for example, as 1973047561 + 33814225 = 44419^2 + 5815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984671 + ... + 986706.

Almost surely, 2^2006861786 is an apocalyptic number.

2006861786 is a deficient number, since it is larger than the sum of its proper divisors (1009346554).

2006861786 is a wasteful number, since it uses less digits than its factorization.

2006861786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971888.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 2006861786 is about 44798.0109603094. The cubic root of 2006861786 is about 1261.3602899583.

The spelling of 2006861786 in words is "two billion, six million, eight hundred sixty-one thousand, seven hundred eighty-six".