66680276 has 24 divisors (see below), whose sum is σ = 127548960. Its totient is φ = 30314592.

The previous prime is 66680267. The next prime is 66680279. The reversal of 66680276 is 67208666.

It is a super-3 number, since 3×66680276³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66680279) 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 7 ways as a sum of consecutive naturals, for example, 6086 + ... + 13053.

It is an arithmetic number, because the mean of its divisors is an integer number (5314540).

Almost surely, 2^66680276 is an apocalyptic number.

It is an amenable number.

66680276 is a deficient number, since it is larger than the sum of its proper divisors (60868684).

66680276 is a wasteful number, since it uses less digits than its factorization.

66680276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19223 (or 19221 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 66680276 is about 8165.7991648093. The cubic root of 66680276 is about 405.5077227324.

The spelling of 66680276 in words is "sixty-six million, six hundred eighty thousand, two hundred seventy-six".