7266028081 has 27 divisors (see below), whose sum is σ = 8065968939. Its totient is φ = 6542417232.

The previous prime is 7266028079. The next prime is 7266028087. The reversal of 7266028081 is 1808206627.

The square root of 7266028081 is 85241.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1074856225 + 6191171856 = 32785^2 + 78684^2 .

It is not a de Polignac number, because 7266028081 - 2¹ = 7266028079 is a prime.

It is a super-2 number, since 2×7266028081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7266028087) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 87542466 + ... + 87542548.

Almost surely, 2^7266028081 is an apocalyptic number.

7266028081 is the 85241-st square number.

7266028081 is the 42621-st centered octagonal number.

It is an amenable number.

7266028081 is a deficient number, since it is larger than the sum of its proper divisors (799940858).

7266028081 is an frugal number, since it uses more digits than its factorization.

7266028081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The cubic root of 7266028081 is about 1936.8635400767.

The spelling of 7266028081 in words is "seven billion, two hundred sixty-six million, twenty-eight thousand, eighty-one".