2666768506 has 8 divisors (see below), whose sum is σ = 4001655060. Its totient is φ = 1332883488.

The previous prime is 2666768501. The next prime is 2666768519. The reversal of 2666768506 is 6058676662.

It can be written as a sum of positive squares in 2 ways, for example, as 2293931025 + 372837481 = 47895^2 + 19309^2 .

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

It is a super-2 number, since 2×2666768506² = 14223308529186944072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666768501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243691 + ... + 254398.

Almost surely, 2^2666768506 is an apocalyptic number.

2666768506 is a deficient number, since it is larger than the sum of its proper divisors (1334886554).

2666768506 is a wasteful number, since it uses less digits than its factorization.

2666768506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500768.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The square root of 2666768506 is about 51640.7639951231. The cubic root of 2666768506 is about 1386.7402013390.

The spelling of 2666768506 in words is "two billion, six hundred sixty-six million, seven hundred sixty-eight thousand, five hundred six".