242451666 has 24 divisors (see below), whose sum is σ = 552960720. Its totient is φ = 76563576.

The previous prime is 242451661. The next prime is 242451667. The reversal of 242451666 is 666154242.

242451666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 242451666.

It is not an unprimeable number, because it can be changed into a prime (242451661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354120 + ... + 354803.

It is an arithmetic number, because the mean of its divisors is an integer number (23040030).

Almost surely, 2^242451666 is an apocalyptic number.

242451666 is an abundant number, since it is smaller than the sum of its proper divisors (310509054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242451666 is a wasteful number, since it uses less digits than its factorization.

242451666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708950 (or 708947 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 242451666 is about 15570.8595138483. The cubic root of 242451666 is about 623.5554186547. Note that the first 3 decimals are identical.

The spelling of 242451666 in words is "two hundred forty-two million, four hundred fifty-one thousand, six hundred sixty-six".