666740067 has 8 divisors (see below), whose sum is σ = 1015984896. Its totient is φ = 380994312.

The previous prime is 666740059. The next prime is 666740083. The reversal of 666740067 is 760047666.

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

It is not a de Polignac number, because 666740067 - 2³ = 666740059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666741067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15874743 + ... + 15874784.

It is an arithmetic number, because the mean of its divisors is an integer number (126998112).

Almost surely, 2^666740067 is an apocalyptic number.

666740067 is a deficient number, since it is larger than the sum of its proper divisors (349244829).

666740067 is a wasteful number, since it uses less digits than its factorization.

666740067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31749537.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 666740067 is about 25821.3103269373. The cubic root of 666740067 is about 873.6125241084.

The spelling of 666740067 in words is "six hundred sixty-six million, seven hundred forty thousand, sixty-seven".