66670600 has 48 divisors (see below), whose sum is σ = 164135700. Its totient is φ = 25098240.

The previous prime is 66670547. The next prime is 66670603. The reversal of 66670600 is 607666.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 56160036 + 10510564 = 7494^2 + 3242^2 .

It is not an unprimeable number, because it can be changed into a prime (66670603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6405 + ... + 13204.

Almost surely, 2^66670600 is an apocalyptic number.

It is an amenable number.

66670600 is an abundant number, since it is smaller than the sum of its proper divisors (97465100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66670600 is a wasteful number, since it uses less digits than its factorization.

66670600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19642 (or 19633 counting only the distinct ones).

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

The square root of 66670600 is about 8165.2066722160. The cubic root of 66670600 is about 405.4881073240.

The spelling of 66670600 in words is "sixty-six million, six hundred seventy thousand, six hundred".