666033442 has 4 divisors (see below), whose sum is σ = 999050166. Its totient is φ = 333016720.

The previous prime is 666033439. The next prime is 666033443. The reversal of 666033442 is 244330666.

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., 487570561 + 178462881 = 22081^2 + 13359^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666033398 and 666033407.

It is not an unprimeable number, because it can be changed into a prime (666033443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166508359 + ... + 166508362.

Almost surely, 2^666033442 is an apocalyptic number.

666033442 is a deficient number, since it is larger than the sum of its proper divisors (333016724).

666033442 is a wasteful number, since it uses less digits than its factorization.

666033442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333016723.

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 666033442 is about 25807.6237185836. The cubic root of 666033442 is about 873.3037907701.

The spelling of 666033442 in words is "six hundred sixty-six million, thirty-three thousand, four hundred forty-two".