75660070221 has 40 divisors (see below), whose sum is σ = 119411318400. Its totient is φ = 47608715520.

The previous prime is 75660070217. The next prime is 75660070223. The reversal of 75660070221 is 12207006657.

75660070221 is a `hidden beast` number, since 7 + 566 + 0 + 0 + 70 + 2 + 21 = 666.

It is not a de Polignac number, because 75660070221 - 2² = 75660070217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75660070223) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 326365 + ... + 507773.

It is an arithmetic number, because the mean of its divisors is an integer number (2985282960).

Almost surely, 2^75660070221 is an apocalyptic number.

It is an amenable number.

75660070221 is a deficient number, since it is larger than the sum of its proper divisors (43751248179).

75660070221 is a wasteful number, since it uses less digits than its factorization.

75660070221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181711 (or 181702 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

Adding to 75660070221 its reverse (12207006657), we get a palindrome (87867076878).

The spelling of 75660070221 in words is "seventy-five billion, six hundred sixty million, seventy thousand, two hundred twenty-one".