666136330 has 48 divisors (see below), whose sum is σ = 1298057400. Its totient is φ = 245992448.

The previous prime is 666136301. The next prime is 666136363. The reversal of 666136330 is 33631666.

It can be written as a sum of positive squares in 12 ways, for example, as 107806689 + 558329641 = 10383^2 + 23629^2 .

It is a super-2 number, since 2×666136330² = 887475220291737800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150996 + ... + 155344.

Almost surely, 2^666136330 is an apocalyptic number.

666136330 is a deficient number, since it is larger than the sum of its proper divisors (631921070).

666136330 is a wasteful number, since it uses less digits than its factorization.

666136330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 34.

The square root of 666136330 is about 25809.6170060697. The cubic root of 666136330 is about 873.3487574081.

Adding to 666136330 its reverse (33631666), we get a palindrome (699767996).

The spelling of 666136330 in words is "six hundred sixty-six million, one hundred thirty-six thousand, three hundred thirty".