166021022240452 has 24 divisors (see below), whose sum is σ = 290935824454296. Its totient is φ = 82896503048448.

The previous prime is 166021022240309. The next prime is 166021022240467. The reversal of 166021022240452 is 254042220120661.

166021022240452 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 4 ways, for example, as 109891947180096 + 56129075060356 = 10482936^2 + 7491934^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456204438 + ... + 456568210.

It is an arithmetic number, because the mean of its divisors is an integer number (12122326018929).

Almost surely, 2^{166021022240452} is an apocalyptic number.

It is an amenable number.

166021022240452 is a deficient number, since it is larger than the sum of its proper divisors (124914802213844).

166021022240452 is a wasteful number, since it uses less digits than its factorization.

166021022240452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520167 (or 520165 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 166021022240452 in words is "one hundred sixty-six trillion, twenty-one billion, twenty-two million, two hundred forty thousand, four hundred fifty-two".