2665743901 has 2 divisors, whose sum is σ = 2665743902. Its totient is φ = 2665743900.

The previous prime is 2665743893. The next prime is 2665743923. The reversal of 2665743901 is 1093475662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852011225 + 813732676 = 43035^2 + 28526^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665743901 - 2³ = 2665743893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665740901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332871950 + 1332871951.

It is an arithmetic number, because the mean of its divisors is an integer number (1332871951).

Almost surely, 2^2665743901 is an apocalyptic number.

It is an amenable number.

2665743901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665743901 is an equidigital number, since it uses as much as digits as its factorization.

2665743901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 2665743901 is about 51630.8425362205. The cubic root of 2665743901 is about 1386.5625777532.

The spelling of 2665743901 in words is "two billion, six hundred sixty-five million, seven hundred forty-three thousand, nine hundred one".