2666052397 has 4 divisors (see below), whose sum is σ = 2709758236. Its totient is φ = 2622346560.

The previous prime is 2666052391. The next prime is 2666052413. The reversal of 2666052397 is 7932506662.

It is a happy number.

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 1508079556 + 1157972841 = 38834^2 + 34029^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666052397 - 2¹¹ = 2666050349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666052391) 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 in 3 ways as a sum of consecutive naturals, for example, 21852828 + ... + 21852949.

It is an arithmetic number, because the mean of its divisors is an integer number (677439559).

Almost surely, 2^2666052397 is an apocalyptic number.

It is an amenable number.

2666052397 is a deficient number, since it is larger than the sum of its proper divisors (43705839).

2666052397 is an equidigital number, since it uses as much as digits as its factorization.

2666052397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43705838.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 2666052397 is about 51633.8299664087. The cubic root of 2666052397 is about 1386.6160628248.

The spelling of 2666052397 in words is "two billion, six hundred sixty-six million, fifty-two thousand, three hundred ninety-seven".