666024642 has 24 divisors (see below), whose sum is σ = 1482056316. Its totient is φ = 216007776.

The previous prime is 666024637. The next prime is 666024649. The reversal of 666024642 is 246420666.

It can be written as a sum of positive squares in 2 ways, for example, as 520798041 + 145226601 = 22821^2 + 12051^2 .

666024642 is a modest number, since divided by 24642 gives 666 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 666024597 and 666024606.

It is not an unprimeable number, because it can be changed into a prime (666024649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499353 + ... + 500684.

Almost surely, 2^666024642 is an apocalyptic number.

666024642 is an abundant number, since it is smaller than the sum of its proper divisors (816031674).

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

666024642 is a wasteful number, since it uses less digits than its factorization.

666024642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000082 (or 1000079 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 666024642 is about 25807.4532257641. The cubic root of 666024642 is about 873.2999445632.

It can be divided in two parts, 666024 and 642, that added together give a palindrome (666666).

The spelling of 666024642 in words is "six hundred sixty-six million, twenty-four thousand, six hundred forty-two".