221660032074644 has 6 divisors (see below), whose sum is σ = 387905056130634. Its totient is φ = 110830016037320.

The previous prime is 221660032074529. The next prime is 221660032074667. The reversal of 221660032074644 is 446470230066122.

221660032074644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 191438493376900 + 30221538697744 = 13836130^2 + 5497412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27707504009327 + ... + 27707504009334.

It is an arithmetic number, because the mean of its divisors is an integer number (64650842688439).

Almost surely, 2^{221660032074644} is an apocalyptic number.

It is an amenable number.

221660032074644 is a deficient number, since it is larger than the sum of its proper divisors (166245024055990).

221660032074644 is a wasteful number, since it uses less digits than its factorization.

221660032074644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55415008018665 (or 55415008018663 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 221660032074644 in words is "two hundred twenty-one trillion, six hundred sixty billion, thirty-two million, seventy-four thousand, six hundred forty-four".