7506121165 has 4 divisors (see below), whose sum is σ = 9007345404. Its totient is φ = 6004896928.

The previous prime is 7506121159. The next prime is 7506121169. The reversal of 7506121165 is 5611216057.

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 2350019529 + 5156101636 = 48477^2 + 71806^2 .

It is a cyclic number.

It is not a de Polignac number, because 7506121165 - 2³ = 7506121157 is a prime.

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 7506121165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7506121169) 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, 750612112 + ... + 750612121.

It is an arithmetic number, because the mean of its divisors is an integer number (2251836351).

Almost surely, 2^7506121165 is an apocalyptic number.

It is an amenable number.

7506121165 is a deficient number, since it is larger than the sum of its proper divisors (1501224239).

7506121165 is a wasteful number, since it uses less digits than its factorization.

7506121165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501224238.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 7506121165 is about 86637.8737331428. The cubic root of 7506121165 is about 1957.9661991269.

The spelling of 7506121165 in words is "seven billion, five hundred six million, one hundred twenty-one thousand, one hundred sixty-five".