2666143401 has 4 divisors (see below), whose sum is σ = 3554857872. Its totient is φ = 1777428932.

The previous prime is 2666143397. The next prime is 2666143421. The reversal of 2666143401 is 1043416662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2666143401 - 2² = 2666143397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2666143421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444357231 + ... + 444357236.

It is an arithmetic number, because the mean of its divisors is an integer number (888714468).

Almost surely, 2^2666143401 is an apocalyptic number.

It is an amenable number.

2666143401 is a deficient number, since it is larger than the sum of its proper divisors (888714471).

2666143401 is an equidigital number, since it uses as much as digits as its factorization.

2666143401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888714470.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2666143401 is about 51634.7112028333. The cubic root of 2666143401 is about 1386.6318397305.

The spelling of 2666143401 in words is "two billion, six hundred sixty-six million, one hundred forty-three thousand, four hundred one".