666680074 has 8 divisors (see below), whose sum is σ = 1000677888. Its totient is φ = 333120780.

The previous prime is 666680071. The next prime is 666680081. The reversal of 666680074 is 470086666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 666680074.

It is not an unprimeable number, because it can be changed into a prime (666680071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105802 + ... + 111925.

It is an arithmetic number, because the mean of its divisors is an integer number (125084736).

Almost surely, 2^666680074 is an apocalyptic number.

666680074 is a deficient number, since it is larger than the sum of its proper divisors (333997814).

666680074 is a wasteful number, since it uses less digits than its factorization.

666680074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219260.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 666680074 is about 25820.1486053043. The cubic root of 666680074 is about 873.5863208893.

The spelling of 666680074 in words is "six hundred sixty-six million, six hundred eighty thousand, seventy-four".