2668005539 has 4 divisors (see below), whose sum is σ = 2760005760. Its totient is φ = 2576005320.

The previous prime is 2668005499. The next prime is 2668005577. The reversal of 2668005539 is 9355008662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9355008662 = 2 ⋅4677504331.

It is a cyclic number.

It is not a de Polignac number, because 2668005539 - 2⁸ = 2668005283 is a prime.

It is a super-2 number, since 2×2668005539² = 14236507112269361042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2668005539.

It is not an unprimeable number, because it can be changed into a prime (2668002539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46000067 + ... + 46000124.

It is an arithmetic number, because the mean of its divisors is an integer number (690001440).

Almost surely, 2^2668005539 is an apocalyptic number.

2668005539 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2668005539 is a deficient number, since it is larger than the sum of its proper divisors (92000221).

2668005539 is an equidigital number, since it uses as much as digits as its factorization.

2668005539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92000220.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 2668005539 is about 51652.7398982861. The cubic root of 2668005539 is about 1386.9545904281.

The spelling of 2668005539 in words is "two billion, six hundred sixty-eight million, five thousand, five hundred thirty-nine".