76610220221 has 4 divisors (see below), whose sum is σ = 76611049152. Its totient is φ = 76609391292.

The previous prime is 76610220191. The next prime is 76610220227. The reversal of 76610220221 is 12202201667.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 76610220221 - 2¹⁰ = 76610219197 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 (76610220227) 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 3 ways as a sum of consecutive naturals, for example, 255515 + ... + 467448.

It is an arithmetic number, because the mean of its divisors is an integer number (19152762288).

Almost surely, 2^76610220221 is an apocalyptic number.

It is an amenable number.

76610220221 is a deficient number, since it is larger than the sum of its proper divisors (828931).

76610220221 is a wasteful number, since it uses less digits than its factorization.

76610220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828930.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 76610220221 its reverse (12202201667), we get a palindrome (88812421888).

The spelling of 76610220221 in words is "seventy-six billion, six hundred ten million, two hundred twenty thousand, two hundred twenty-one".