601605666 has 12 divisors (see below), whose sum is σ = 1303478982. Its totient is φ = 200535216.

The previous prime is 601605659. The next prime is 601605689. The reversal of 601605666 is 666506106.

601605666 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., 402203025 + 199402641 = 20055^2 + 14121^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 601605666.

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, 16711251 + ... + 16711286.

Almost surely, 2^601605666 is an apocalyptic number.

601605666 is an abundant number, since it is smaller than the sum of its proper divisors (701873316).

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

601605666 is a wasteful number, since it uses less digits than its factorization.

601605666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33422545 (or 33422542 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 601605666 is about 24527.6510493769. The cubic root of 601605666 is about 844.1843680169.

The spelling of 601605666 in words is "six hundred one million, six hundred five thousand, six hundred sixty-six".