66766670 has 8 divisors (see below), whose sum is σ = 120180024. Its totient is φ = 26706664.

The previous prime is 66766669. The next prime is 66766673. The reversal of 66766670 is 7666766.

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 (66766673) 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, 3338324 + ... + 3338343.

It is an arithmetic number, because the mean of its divisors is an integer number (15022503).

Almost surely, 2^66766670 is an apocalyptic number.

66766670 is a deficient number, since it is larger than the sum of its proper divisors (53413354).

66766670 is a wasteful number, since it uses less digits than its factorization.

66766670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6676674.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 66766670 is about 8171.0874429295. The cubic root of 66766670 is about 405.6827785704.

It can be divided in two parts, 6 and 6766670, that added together give a palindrome (6766676).

The spelling of 66766670 in words is "sixty-six million, seven hundred sixty-six thousand, six hundred seventy".