2665501 has 2 divisors, whose sum is σ = 2665502. Its totient is φ = 2665500.

The previous prime is 2665499. The next prime is 2665513. The reversal of 2665501 is 1055662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2033476 + 632025 = 1426^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665501 - 2¹ = 2665499 is a prime.

Together with 2665499, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332750 + 1332751.

It is an arithmetic number, because the mean of its divisors is an integer number (1332751).

2^2665501 is an apocalyptic number.

It is an amenable number.

2665501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665501 is an equidigital number, since it uses as much as digits as its factorization.

2665501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2665501 is about 1632.6362117753. The cubic root of 2665501 is about 138.6520462221.

The spelling of 2665501 in words is "two million, six hundred sixty-five thousand, five hundred one".