441691666669 has 4 divisors (see below), whose sum is σ = 481845454560. Its totient is φ = 401537878780.

The previous prime is 441691666627. The next prime is 441691666687. The reversal of 441691666669 is 966666196144.

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.

It is a cyclic number.

It is not a de Polignac number, because 441691666669 - 2³¹ = 439544183021 is a prime.

It is a super-2 number, since 2×441691666669² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 441691666669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441691663669) 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, 20076893929 + ... + 20076893950.

It is an arithmetic number, because the mean of its divisors is an integer number (120461363640).

Almost surely, 2^441691666669 is an apocalyptic number.

It is an amenable number.

441691666669 is a deficient number, since it is larger than the sum of its proper divisors (40153787891).

441691666669 is a wasteful number, since it uses less digits than its factorization.

441691666669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40153787890.

The product of its digits is 60466176, while the sum is 64.

The spelling of 441691666669 in words is "four hundred forty-one billion, six hundred ninety-one million, six hundred sixty-six thousand, six hundred sixty-nine".