669086776 has 8 divisors (see below), whose sum is σ = 1254537720. Its totient is φ = 334543384.

The previous prime is 669086773. The next prime is 669086777. The reversal of 669086776 is 677680966.

669086776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×669086776² = 895354227636148352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669086771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41817916 + ... + 41817931.

It is an arithmetic number, because the mean of its divisors is an integer number (156817215).

Almost surely, 2^669086776 is an apocalyptic number.

It is an amenable number.

669086776 is a deficient number, since it is larger than the sum of its proper divisors (585450944).

669086776 is a wasteful number, since it uses less digits than its factorization.

669086776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83635853 (or 83635849 counting only the distinct ones).

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

The square root of 669086776 is about 25866.7117353559. The cubic root of 669086776 is about 874.6362683031.

The spelling of 669086776 in words is "six hundred sixty-nine million, eighty-six thousand, seven hundred seventy-six".