77700666 has 16 divisors (see below), whose sum is σ = 159601824. Its totient is φ = 25200144.

The previous prime is 77700653. The next prime is 77700673. The reversal of 77700666 is 66600777.

It is a Curzon number.

It is a zygodrome in base 10.

It is an unprimeable number.

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, 174780 + ... + 175223.

It is an arithmetic number, because the mean of its divisors is an integer number (9975114).

Almost surely, 2^77700666 is an apocalyptic number.

77700666 is an abundant number, since it is smaller than the sum of its proper divisors (81901158).

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

77700666 is a wasteful number, since it uses less digits than its factorization.

77700666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350045.

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 77700666 is about 8814.7981258790. The cubic root of 77700666 is about 426.7186068224.

The spelling of 77700666 in words is "seventy-seven million, seven hundred thousand, six hundred sixty-six".