66006670 has 8 divisors (see below), whose sum is σ = 118812024. Its totient is φ = 26402664.

The previous prime is 66006667. The next prime is 66006671. The reversal of 66006670 is 7660066.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66006671) 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, 3300324 + ... + 3300343.

It is an arithmetic number, because the mean of its divisors is an integer number (14851503).

Almost surely, 2^66006670 is an apocalyptic number.

66006670 is a deficient number, since it is larger than the sum of its proper divisors (52805354).

66006670 is a wasteful number, since it uses less digits than its factorization.

66006670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600674.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 66006670 is about 8124.4489043873. The cubic root of 66006670 is about 404.1376152758.

The spelling of 66006670 in words is "sixty-six million, six thousand, six hundred seventy".