74677442221 has 4 divisors (see below), whose sum is σ = 74678188000. Its totient is φ = 74676696444.

The previous prime is 74677442159. The next prime is 74677442227. The reversal of 74677442221 is 12224477647.

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 74677442221 - 2¹⁵ = 74677409453 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 (74677442227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194121 + ... + 432478.

It is an arithmetic number, because the mean of its divisors is an integer number (18669547000).

Almost surely, 2^74677442221 is an apocalyptic number.

It is an amenable number.

74677442221 is a deficient number, since it is larger than the sum of its proper divisors (745779).

74677442221 is a wasteful number, since it uses less digits than its factorization.

74677442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745778.

The product of its digits is 1053696, while the sum is 46.

The spelling of 74677442221 in words is "seventy-four billion, six hundred seventy-seven million, four hundred forty-two thousand, two hundred twenty-one".