7520516665 has 4 divisors (see below), whose sum is σ = 9024620004. Its totient is φ = 6016413328.

The previous prime is 7520516651. The next prime is 7520516677. The reversal of 7520516665 is 5666150257.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2907797776 + 4612718889 = 53924^2 + 67917^2 .

It is a cyclic number.

It is not a de Polignac number, because 7520516665 - 2⁷ = 7520516537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752051662 + ... + 752051671.

It is an arithmetic number, because the mean of its divisors is an integer number (2256155001).

Almost surely, 2^7520516665 is an apocalyptic number.

It is an amenable number.

7520516665 is a deficient number, since it is larger than the sum of its proper divisors (1504103339).

7520516665 is a wasteful number, since it uses less digits than its factorization.

7520516665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504103338.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 7520516665 is about 86720.9125009648. The cubic root of 7520516665 is about 1959.2170850079.

The spelling of 7520516665 in words is "seven billion, five hundred twenty million, five hundred sixteen thousand, six hundred sixty-five".