242621127666 has 12 divisors (see below), whose sum is σ = 525679109982. Its totient is φ = 80873709216.

The previous prime is 242621127647. The next prime is 242621127713. The reversal of 242621127666 is 666721126242.

It can be written as a sum of positive squares in only one way, i.e., 201865997025 + 40755130641 = 449295^2 + 201879^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6739475751 + ... + 6739475786.

Almost surely, 2^242621127666 is an apocalyptic number.

242621127666 is an abundant number, since it is smaller than the sum of its proper divisors (283057982316).

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

242621127666 is a wasteful number, since it uses less digits than its factorization.

242621127666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478951545 (or 13478951542 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 242621127666 in words is "two hundred forty-two billion, six hundred twenty-one million, one hundred twenty-seven thousand, six hundred sixty-six".