666742002 has 8 divisors (see below), whose sum is σ = 1333484016. Its totient is φ = 222247332.

The previous prime is 666741997. The next prime is 666742007. The reversal of 666742002 is 200247666.

It is an interprime number because it is at equal distance from previous prime (666741997) and next prime (666742007).

It is a sphenic number, since it is the product of 3 distinct primes.

666742002 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (666742007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55561828 + ... + 55561839.

It is an arithmetic number, because the mean of its divisors is an integer number (166685502).

Almost surely, 2^666742002 is an apocalyptic number.

666742002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

666742002 is a wasteful number, since it uses less digits than its factorization.

666742002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111123672.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 666742002 is about 25821.3477959614. The cubic root of 666742002 is about 873.6133692346.

Adding to 666742002 its reverse (200247666), we get a palindrome (866989668).

The spelling of 666742002 in words is "six hundred sixty-six million, seven hundred forty-two thousand, two".