1669726616 has 8 divisors (see below), whose sum is σ = 3130737420. Its totient is φ = 834863304.

The previous prime is 1669726613. The next prime is 1669726657. The reversal of 1669726616 is 6166279661.

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

It is a super-2 number, since 2×1669726616² = 5575973944357622912, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669726613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104357906 + ... + 104357921.

Almost surely, 2^1669726616 is an apocalyptic number.

It is an amenable number.

1669726616 is a deficient number, since it is larger than the sum of its proper divisors (1461010804).

1669726616 is a wasteful number, since it uses less digits than its factorization.

1669726616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208715833 (or 208715829 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 1669726616 is about 40862.2884332241. The cubic root of 1669726616 is about 1186.3562521125.

The spelling of 1669726616 in words is "one billion, six hundred sixty-nine million, seven hundred twenty-six thousand, six hundred sixteen".