2640433706 has 4 divisors (see below), whose sum is σ = 3960650562. Its totient is φ = 1320216852.

The previous prime is 2640433687. The next prime is 2640433709. The reversal of 2640433706 is 6073340462.

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., 1845475681 + 794958025 = 42959^2 + 28195^2 .

It is not an unprimeable number, because it can be changed into a prime (2640433709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660108425 + ... + 660108428.

Almost surely, 2^2640433706 is an apocalyptic number.

2640433706 is a deficient number, since it is larger than the sum of its proper divisors (1320216856).

2640433706 is a wasteful number, since it uses less digits than its factorization.

2640433706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320216855.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 2640433706 is about 51385.1506371247. The cubic root of 2640433706 is about 1382.1603259999.

The spelling of 2640433706 in words is "two billion, six hundred forty million, four hundred thirty-three thousand, seven hundred six".