242553646066 has 4 divisors (see below), whose sum is σ = 363830469102. Its totient is φ = 121276823032.

The previous prime is 242553646063. The next prime is 242553646189. The reversal of 242553646066 is 660646355242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660646355242 = 2 ⋅330323177621.

It can be written as a sum of positive squares in only one way, i.e., 188815451841 + 53738194225 = 434529^2 + 231815^2 .

It is not an unprimeable number, because it can be changed into a prime (242553646063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638411515 + ... + 60638411518.

Almost surely, 2^242553646066 is an apocalyptic number.

242553646066 is a deficient number, since it is larger than the sum of its proper divisors (121276823036).

242553646066 is a wasteful number, since it uses less digits than its factorization.

242553646066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121276823035.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 242553646066 in words is "two hundred forty-two billion, five hundred fifty-three million, six hundred forty-six thousand, sixty-six".