66766130 has 24 divisors (see below), whose sum is σ = 123540228. Its totient is φ = 25979328.

The previous prime is 66766129. The next prime is 66766159. The reversal of 66766130 is 3166766.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 50452609 + 16313521 = 7103^2 + 4039^2 .

It is a super-2 number, since 2×66766130² = 8915432230353800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11252 + ... + 16128.

Almost surely, 2^66766130 is an apocalyptic number.

66766130 is a deficient number, since it is larger than the sum of its proper divisors (56774098).

66766130 is a wasteful number, since it uses less digits than its factorization.

66766130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958 (or 4921 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66766130 is about 8171.0543995252. The cubic root of 66766130 is about 405.6816848645.

The spelling of 66766130 in words is "sixty-six million, seven hundred sixty-six thousand, one hundred thirty".