75118067221 has 8 divisors (see below), whose sum is σ = 79029952344. Its totient is φ = 71305217280.

The previous prime is 75118067209. The next prime is 75118067231. The reversal of 75118067221 is 12276081157.

It can be written as a sum of positive squares in 4 ways, for example, as 25673652900 + 49444414321 = 160230^2 + 222361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 75118067221 - 2¹⁷ = 75117936149 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 (75118067231) 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, 24757240 + ... + 24760273.

It is an arithmetic number, because the mean of its divisors is an integer number (9878744043).

Almost surely, 2^75118067221 is an apocalyptic number.

It is an amenable number.

75118067221 is a deficient number, since it is larger than the sum of its proper divisors (3911885123).

75118067221 is a wasteful number, since it uses less digits than its factorization.

75118067221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49517591.

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 75118067221 in words is "seventy-five billion, one hundred eighteen million, sixty-seven thousand, two hundred twenty-one".