266606642 has 16 divisors (see below), whose sum is σ = 411428160. Its totient is φ = 129513072.

The previous prime is 266606623. The next prime is 266606647. The reversal of 266606642 is 246606662.

It is a junction number, because it is equal to n+sod(n) for n = 266606596 and 266606605.

It is not an unprimeable number, because it can be changed into a prime (266606647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1292 + ... + 23127.

It is an arithmetic number, because the mean of its divisors is an integer number (25714260).

Almost surely, 2^266606642 is an apocalyptic number.

266606642 is a deficient number, since it is larger than the sum of its proper divisors (144821518).

266606642 is a wasteful number, since it uses less digits than its factorization.

266606642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24577.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 266606642 is about 16328.0936425536. The cubic root of 266606642 is about 643.6112917977.

The spelling of 266606642 in words is "two hundred sixty-six million, six hundred six thousand, six hundred forty-two".