2665822001 has 4 divisors (see below), whose sum is σ = 2691703872. Its totient is φ = 2639940132.

The previous prime is 2665821989. The next prime is 2665822007. The reversal of 2665822001 is 1002285662.

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 2665822001 - 2¹⁴ = 2665805617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665822007) 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, 12940781 + ... + 12940986.

It is an arithmetic number, because the mean of its divisors is an integer number (672925968).

Almost surely, 2^2665822001 is an apocalyptic number.

It is an amenable number.

2665822001 is a deficient number, since it is larger than the sum of its proper divisors (25881871).

2665822001 is a wasteful number, since it uses less digits than its factorization.

2665822001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25881870.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2665822001 is about 51631.5988615499. The cubic root of 2665822001 is about 1386.5761186239.

The spelling of 2665822001 in words is "two billion, six hundred sixty-five million, eight hundred twenty-two thousand, one".