669825077 has 8 divisors (see below), whose sum is σ = 699111000. Its totient is φ = 641155840.

The previous prime is 669825073. The next prime is 669825089. The reversal of 669825077 is 770528966.

It can be written as a sum of positive squares in 4 ways, for example, as 361201 + 669463876 = 601^2 + 25874^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 669825077 - 2² = 669825073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669825073) 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, 151952 + ... + 156297.

It is an arithmetic number, because the mean of its divisors is an integer number (87388875).

Almost surely, 2^669825077 is an apocalyptic number.

It is an amenable number.

669825077 is a deficient number, since it is larger than the sum of its proper divisors (29285923).

669825077 is a wasteful number, since it uses less digits than its factorization.

669825077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308343.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 669825077 is about 25880.9790579877. The cubic root of 669825077 is about 874.9578546231.

The spelling of 669825077 in words is "six hundred sixty-nine million, eight hundred twenty-five thousand, seventy-seven".