76666820 has 24 divisors (see below), whose sum is σ = 168001344. Its totient is φ = 29333216.

The previous prime is 76666817. The next prime is 76666829. The reversal of 76666820 is 2866667.

It is not an unprimeable number, because it can be changed into a prime (76666829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82874 + ... + 83793.

It is an arithmetic number, because the mean of its divisors is an integer number (7000056).

Almost surely, 2^76666820 is an apocalyptic number.

It is an amenable number.

76666820 is an abundant number, since it is smaller than the sum of its proper divisors (91334524).

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

76666820 is a wasteful number, since it uses less digits than its factorization.

76666820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166699 (or 166697 counting only the distinct ones).

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

The square root of 76666820 is about 8755.9591136551. The cubic root of 76666820 is about 424.8175826141.

The spelling of 76666820 in words is "seventy-six million, six hundred sixty-six thousand, eight hundred twenty".