7540670221 has 12 divisors (see below), whose sum is σ = 9153184032. Its totient is φ = 6182411928.

The previous prime is 7540670183. The next prime is 7540670227. The reversal of 7540670221 is 1220760457.

7540670221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-7540670221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540670227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3344335 + ... + 3346588.

It is an arithmetic number, because the mean of its divisors is an integer number (762765336).

Almost surely, 2^7540670221 is an apocalyptic number.

It is an amenable number.

7540670221 is a deficient number, since it is larger than the sum of its proper divisors (1612513811).

7540670221 is a wasteful number, since it uses less digits than its factorization.

7540670221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690960 (or 6690953 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 7540670221 is about 86837.0325437253. The cubic root of 7540670221 is about 1960.9656338766.

The spelling of 7540670221 in words is "seven billion, five hundred forty million, six hundred seventy thousand, two hundred twenty-one".