669036773 has 4 divisors (see below), whose sum is σ = 669090240. Its totient is φ = 668983308.

The previous prime is 669036737. The next prime is 669036787. The reversal of 669036773 is 377630966.

669036773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 669036773 - 2¹⁰ = 669035749 is a prime.

It is a super-2 number, since 2×669036773² = 895220407252507058, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669036713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3236 + ... + 36722.

It is an arithmetic number, because the mean of its divisors is an integer number (167272560).

Almost surely, 2^669036773 is an apocalyptic number.

It is an amenable number.

669036773 is a deficient number, since it is larger than the sum of its proper divisors (53467).

669036773 is a wasteful number, since it uses less digits than its factorization.

669036773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53466.

The product of its (nonzero) digits is 857304, while the sum is 47.

The square root of 669036773 is about 25865.7451661459. The cubic root of 669036773 is about 874.6144796361.

The spelling of 669036773 in words is "six hundred sixty-nine million, thirty-six thousand, seven hundred seventy-three".