665424542466 has 12 divisors (see below), whose sum is σ = 1441753175382. Its totient is φ = 221808180816.

The previous prime is 665424542459. The next prime is 665424542467. The reversal of 665424542466 is 664245424566.

665424542466 is a `hidden beast` number, since 6 + 6 + 54 + 2 + 4 + 542 + 46 + 6 = 666.

665424542466 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., 475789550625 + 189634991841 = 689775^2 + 435471^2 .

It is a super-2 number, since 2×665424542466² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (665424542467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18484015051 + ... + 18484015086.

Almost surely, 2^665424542466 is an apocalyptic number.

665424542466 is an abundant number, since it is smaller than the sum of its proper divisors (776328632916).

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

665424542466 is a wasteful number, since it uses less digits than its factorization.

665424542466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36968030145 (or 36968030142 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 54.

The spelling of 665424542466 in words is "six hundred sixty-five billion, four hundred twenty-four million, five hundred forty-two thousand, four hundred sixty-six".