7290665761 has 4 divisors (see below), whose sum is σ = 7316986132. Its totient is φ = 7264345392.

The previous prime is 7290665749. The next prime is 7290665819. The reversal of 7290665761 is 1675660927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1675660927 = 6353 ⋅263759.

It can be written as a sum of positive squares in 2 ways, for example, as 2742512161 + 4548153600 = 52369^2 + 67440^2 .

It is a cyclic number.

It is not a de Polignac number, because 7290665761 - 2¹⁹ = 7290141473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7290665461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13159770 + ... + 13160323.

It is an arithmetic number, because the mean of its divisors is an integer number (1829246533).

Almost surely, 2^7290665761 is an apocalyptic number.

It is an amenable number.

7290665761 is a deficient number, since it is larger than the sum of its proper divisors (26320371).

7290665761 is a wasteful number, since it uses less digits than its factorization.

7290665761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26320370.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 7290665761 is about 85385.3954783838. The cubic root of 7290665761 is about 1939.0502455115.

The spelling of 7290665761 in words is "seven billion, two hundred ninety million, six hundred sixty-five thousand, seven hundred sixty-one".