2630465665 has 4 divisors (see below), whose sum is σ = 3156558804. Its totient is φ = 2104372528.

The previous prime is 2630465657. The next prime is 2630465671. The reversal of 2630465665 is 5665640362.

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 831687921 + 1798777744 = 28839^2 + 42412^2 .

It is a cyclic number.

It is not a de Polignac number, because 2630465665 - 2³ = 2630465657 is a prime.

It is a super-3 number, since 3×2630465665³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263046562 + ... + 263046571.

It is an arithmetic number, because the mean of its divisors is an integer number (789139701).

Almost surely, 2^2630465665 is an apocalyptic number.

It is an amenable number.

2630465665 is a deficient number, since it is larger than the sum of its proper divisors (526093139).

2630465665 is an equidigital number, since it uses as much as digits as its factorization.

2630465665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526093138.

The product of its (nonzero) digits is 777600, while the sum is 43.

The square root of 2630465665 is about 51288.0655221076. The cubic root of 2630465665 is about 1380.4188438433.

The spelling of 2630465665 in words is "two billion, six hundred thirty million, four hundred sixty-five thousand, six hundred sixty-five".