7506632721 has 8 divisors (see below), whose sum is σ = 11438678464. Its totient is φ = 4289504400.

The previous prime is 7506632711. The next prime is 7506632753. The reversal of 7506632721 is 1272366057.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7506632721 - 2¹⁸ = 7506370577 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 7506632721.

It is not an unprimeable number, because it can be changed into a prime (7506632701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178729330 + ... + 178729371.

It is an arithmetic number, because the mean of its divisors is an integer number (1429834808).

Almost surely, 2^7506632721 is an apocalyptic number.

It is an amenable number.

7506632721 is a deficient number, since it is larger than the sum of its proper divisors (3932045743).

7506632721 is a wasteful number, since it uses less digits than its factorization.

7506632721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357458711.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 7506632721 is about 86640.8259482791. The cubic root of 7506632721 is about 1958.0106777856.

Adding to 7506632721 its reverse (1272366057), we get a palindrome (8778998778).

The spelling of 7506632721 in words is "seven billion, five hundred six million, six hundred thirty-two thousand, seven hundred twenty-one".