666446462042 has 4 divisors (see below), whose sum is σ = 999669693066. Its totient is φ = 333223231020.

The previous prime is 666446462041. The next prime is 666446462047. The reversal of 666446462042 is 240264644666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 464781699001 + 201664763041 = 681749^2 + 449071^2 .

It is not an unprimeable number, because it can be changed into a prime (666446462041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166611615509 + ... + 166611615512.

Almost surely, 2^666446462042 is an apocalyptic number.

666446462042 is a deficient number, since it is larger than the sum of its proper divisors (333223231024).

666446462042 is a wasteful number, since it uses less digits than its factorization.

666446462042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333223231023.

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 666446462042 in words is "six hundred sixty-six billion, four hundred forty-six million, four hundred sixty-two thousand, forty-two".