2666768501 has 2 divisors, whose sum is σ = 2666768502. Its totient is φ = 2666768500.

The previous prime is 2666768491. The next prime is 2666768519. The reversal of 2666768501 is 1058676662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1935120100 + 731648401 = 43990^2 + 27049^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666768501 - 2⁶ = 2666768437 is a prime.

It is a super-2 number, since 2×2666768501² = 14223308475851574002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666768551) 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 as a sum of consecutive naturals, namely, 1333384250 + 1333384251.

It is an arithmetic number, because the mean of its divisors is an integer number (1333384251).

Almost surely, 2^2666768501 is an apocalyptic number.

It is an amenable number.

2666768501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666768501 is an equidigital number, since it uses as much as digits as its factorization.

2666768501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 2666768501 is about 51640.7639467117. The cubic root of 2666768501 is about 1386.7402004724.

The spelling of 2666768501 in words is "two billion, six hundred sixty-six million, seven hundred sixty-eight thousand, five hundred one".