66897676 has 24 divisors (see below), whose sum is σ = 118795040. Its totient is φ = 32959872.

The previous prime is 66897673. The next prime is 66897679. The reversal of 66897676 is 67679866.

It is an interprime number because it is at equal distance from previous prime (66897673) and next prime (66897679).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66897673) 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, 163360 + ... + 163768.

Almost surely, 2^66897676 is an apocalyptic number.

It is an amenable number.

66897676 is a deficient number, since it is larger than the sum of its proper divisors (51897364).

66897676 is a wasteful number, since it uses less digits than its factorization.

66897676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 911 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 66897676 is about 8179.0999504835. The cubic root of 66897676 is about 405.9479415889.

It can be divided in two parts, 6689 and 7676, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 66897676 in words is "sixty-six million, eight hundred ninety-seven thousand, six hundred seventy-six".