2665116601 has 4 divisors (see below), whose sum is σ = 3045847552. Its totient is φ = 2284385652.

The previous prime is 2665116589. The next prime is 2665116653. The reversal of 2665116601 is 1066115662.

It is a happy number.

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 2665116601 - 2⁵ = 2665116569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665116691) 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, 190365465 + ... + 190365478.

It is an arithmetic number, because the mean of its divisors is an integer number (761461888).

Almost surely, 2^2665116601 is an apocalyptic number.

It is an amenable number.

2665116601 is a deficient number, since it is larger than the sum of its proper divisors (380730951).

2665116601 is an equidigital number, since it uses as much as digits as its factorization.

2665116601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380730950.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 2665116601 is about 51624.7673215095. The cubic root of 2665116601 is about 1386.4538077473.

The spelling of 2665116601 in words is "two billion, six hundred sixty-five million, one hundred sixteen thousand, six hundred one".