2666343401 has 4 divisors (see below), whose sum is σ = 2669073492. Its totient is φ = 2663613312.

The previous prime is 2666343391. The next prime is 2666343413. The reversal of 2666343401 is 1043436662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2621440000 + 44903401 = 51200^2 + 6701^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666343401 - 2¹⁰ = 2666342377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666346401) 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, 1363580 + ... + 1365533.

It is an arithmetic number, because the mean of its divisors is an integer number (667268373).

Almost surely, 2^2666343401 is an apocalyptic number.

It is an amenable number.

2666343401 is a deficient number, since it is larger than the sum of its proper divisors (2730091).

2666343401 is an equidigital number, since it uses as much as digits as its factorization.

2666343401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730090.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 2666343401 is about 51636.6478482095. The cubic root of 2666343401 is about 1386.6665114632. Note that the first 3 decimals are identical.

The spelling of 2666343401 in words is "two billion, six hundred sixty-six million, three hundred forty-three thousand, four hundred one".