669564077834 has 4 divisors (see below), whose sum is σ = 1004346116754. Its totient is φ = 334782038916.

The previous prime is 669564077797. The next prime is 669564077839. The reversal of 669564077834 is 438770465966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 570274177225 + 99289900609 = 755165^2 + 315103^2 .

It is not an unprimeable number, because it can be changed into a prime (669564077839) 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 as a sum of consecutive naturals, namely, 167391019457 + ... + 167391019460.

Almost surely, 2^669564077834 is an apocalyptic number.

669564077834 is a deficient number, since it is larger than the sum of its proper divisors (334782038920).

669564077834 is a wasteful number, since it uses less digits than its factorization.

669564077834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334782038919.

The product of its (nonzero) digits is 182891520, while the sum is 65.

The spelling of 669564077834 in words is "six hundred sixty-nine billion, five hundred sixty-four million, seventy-seven thousand, eight hundred thirty-four".