2664085021 has 16 divisors (see below), whose sum is σ = 2915313408. Its totient is φ = 2419560000.

The previous prime is 2664085013. The next prime is 2664085027. The reversal of 2664085021 is 1205804662.

It is not a de Polignac number, because 2664085021 - 2³ = 2664085013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664085027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1131996 + ... + 1134346.

It is an arithmetic number, because the mean of its divisors is an integer number (182207088).

Almost surely, 2^2664085021 is an apocalyptic number.

It is an amenable number.

2664085021 is a deficient number, since it is larger than the sum of its proper divisors (251228387).

2664085021 is a wasteful number, since it uses less digits than its factorization.

2664085021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 2664085021 is about 51614.7752198922. The cubic root of 2664085021 is about 1386.2749009293.

Adding to 2664085021 its reverse (1205804662), we get a palindrome (3869889683).

The spelling of 2664085021 in words is "two billion, six hundred sixty-four million, eighty-five thousand, twenty-one".