2061239766 has 32 divisors (see below), whose sum is σ = 4426472448. Its totient is φ = 637553280.

The previous prime is 2061239743. The next prime is 2061239779. The reversal of 2061239766 is 6679321602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135070 + ... + 149553.

It is an arithmetic number, because the mean of its divisors is an integer number (138327264).

Almost surely, 2^2061239766 is an apocalyptic number.

2061239766 is an abundant number, since it is smaller than the sum of its proper divisors (2365232682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2061239766 is a wasteful number, since it uses less digits than its factorization.

2061239766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284716.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 2061239766 is about 45400.8784716772. The cubic root of 2061239766 is about 1272.6515305182.

It can be divided in two parts, 20612 and 39766, that added together give a triangular number (60378 = T₃₄₇).

The spelling of 2061239766 in words is "two billion, sixty-one million, two hundred thirty-nine thousand, seven hundred sixty-six".