2666326505 has 8 divisors (see below), whose sum is σ = 3199907592. Its totient is φ = 2132850688.

The previous prime is 2666326489. The next prime is 2666326511. The reversal of 2666326505 is 5056236662.

It can be written as a sum of positive squares in 4 ways, for example, as 343472089 + 2322854416 = 18533^2 + 48196^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2666326505 - 2⁴ = 2666326489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49019 + ... + 87951.

It is an arithmetic number, because the mean of its divisors is an integer number (399988449).

Almost surely, 2^2666326505 is an apocalyptic number.

It is an amenable number.

2666326505 is a deficient number, since it is larger than the sum of its proper divisors (533581087).

2666326505 is a wasteful number, since it uses less digits than its factorization.

2666326505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52635.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 2666326505 is about 51636.4842432170. The cubic root of 2666326505 is about 1386.6635824623.

The spelling of 2666326505 in words is "two billion, six hundred sixty-six million, three hundred twenty-six thousand, five hundred five".