2665215121 has 8 divisors (see below), whose sum is σ = 2730949760. Its totient is φ = 2599651152.

The previous prime is 2665215107. The next prime is 2665215131. The reversal of 2665215121 is 1215125662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2665215121 - 2¹¹ = 2665213073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665215131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10761 + ... + 73798.

It is an arithmetic number, because the mean of its divisors is an integer number (341368720).

Almost surely, 2^2665215121 is an apocalyptic number.

It is an amenable number.

2665215121 is a deficient number, since it is larger than the sum of its proper divisors (65734639).

2665215121 is an equidigital number, since it uses as much as digits as its factorization.

2665215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85335.

The product of its digits is 7200, while the sum is 31.

The square root of 2665215121 is about 51625.7215058540. The cubic root of 2665215121 is about 1386.4708916460.

The spelling of 2665215121 in words is "two billion, six hundred sixty-five million, two hundred fifteen thousand, one hundred twenty-one".