2665221455 has 32 divisors (see below), whose sum is σ = 3560397120. Its totient is φ = 1902919680.

The previous prime is 2665221401. The next prime is 2665221473. The reversal of 2665221455 is 5541225662.

It is a happy number.

It is not a de Polignac number, because 2665221455 - 2¹⁴ = 2665205071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228239 + ... + 239631.

It is an arithmetic number, because the mean of its divisors is an integer number (111262410).

Almost surely, 2^2665221455 is an apocalyptic number.

2665221455 is a deficient number, since it is larger than the sum of its proper divisors (895175665).

2665221455 is a wasteful number, since it uses less digits than its factorization.

2665221455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11531.

The product of its digits is 144000, while the sum is 38.

The square root of 2665221455 is about 51625.7828512072. The cubic root of 2665221455 is about 1386.4719899813.

The spelling of 2665221455 in words is "two billion, six hundred sixty-five million, two hundred twenty-one thousand, four hundred fifty-five".