2662891645 has 8 divisors (see below), whose sum is σ = 3383438904. Its totient is φ = 2005000704.

The previous prime is 2662891639. The next prime is 2662891681. The reversal of 2662891645 is 5461982662.

2662891645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 640950489 + 2021941156 = 25317^2 + 44966^2 .

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 2662891645 - 2¹¹ = 2662889597 is a prime.

It is a Duffinian number.

It is a congruent 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, 15663984 + ... + 15664153.

It is an arithmetic number, because the mean of its divisors is an integer number (422929863).

Almost surely, 2^2662891645 is an apocalyptic number.

It is an amenable number.

2662891645 is a deficient number, since it is larger than the sum of its proper divisors (720547259).

2662891645 is a wasteful number, since it uses less digits than its factorization.

2662891645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31328159.

The product of its digits is 1244160, while the sum is 49.

The square root of 2662891645 is about 51603.2135142764. The cubic root of 2662891645 is about 1386.0678762203.

The spelling of 2662891645 in words is "two billion, six hundred sixty-two million, eight hundred ninety-one thousand, six hundred forty-five".