2625665701 has 4 divisors (see below), whose sum is σ = 2625793804. Its totient is φ = 2625537600.

The previous prime is 2625665687. The next prime is 2625665719. The reversal of 2625665701 is 1075665262.

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 1799965476 + 825700225 = 42426^2 + 28735^2 .

It is a 3-Lehmer number, since φ(2625665701) divides (2625665701-1)³.

It is a cyclic number.

It is not a de Polignac number, because 2625665701 - 2⁷ = 2625665573 is a prime.

It is a deceptive number, since it divides R_2625665700.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2625665201) 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, 25620 + ... + 76861.

It is an arithmetic number, because the mean of its divisors is an integer number (656448451).

It is a Poulet number, since it divides 2^2625665700-1.

Almost surely, 2^2625665701 is an apocalyptic number.

2625665701 is the 25621-st decagonal number.

It is an amenable number.

2625665701 is a deficient number, since it is larger than the sum of its proper divisors (128103).

2625665701 is a wasteful number, since it uses less digits than its factorization.

2625665701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128102.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 2625665701 is about 51241.2499945113. The cubic root of 2625665701 is about 1379.5786890381.

The spelling of 2625665701 in words is "two billion, six hundred twenty-five million, six hundred sixty-five thousand, seven hundred one".