2666143397 has 2 divisors, whose sum is σ = 2666143398. Its totient is φ = 2666143396.

The previous prime is 2666143393. The next prime is 2666143421. The reversal of 2666143397 is 7933416662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2666069956 + 73441 = 51634^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666143397 - 2² = 2666143393 is a prime.

It is a super-2 number, since 2×2666143397² = 14216641226733399218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666143393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333071698 + 1333071699.

It is an arithmetic number, because the mean of its divisors is an integer number (1333071699).

Almost surely, 2^2666143397 is an apocalyptic number.

It is an amenable number.

2666143397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666143397 is an equidigital number, since it uses as much as digits as its factorization.

2666143397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 47.

The square root of 2666143397 is about 51634.7111640997. The cubic root of 2666143397 is about 1386.6318390371.

The spelling of 2666143397 in words is "two billion, six hundred sixty-six million, one hundred forty-three thousand, three hundred ninety-seven".