1659916069 has 4 divisors (see below), whose sum is σ = 1897046944. Its totient is φ = 1422785196.

The previous prime is 1659916043. The next prime is 1659916103. The reversal of 1659916069 is 9606199561.

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 not a de Polignac number, because 1659916069 - 2⁹ = 1659915557 is a prime.

It is a super-2 number, since 2×1659916069² = 5510642712248825522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659916009) 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, 118565427 + ... + 118565440.

It is an arithmetic number, because the mean of its divisors is an integer number (474261736).

Almost surely, 2^1659916069 is an apocalyptic number.

It is an amenable number.

1659916069 is a deficient number, since it is larger than the sum of its proper divisors (237130875).

1659916069 is an equidigital number, since it uses as much as digits as its factorization.

1659916069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237130874.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 1659916069 is about 40742.0675592194. The cubic root of 1659916069 is about 1184.0281917156.

The spelling of 1659916069 in words is "one billion, six hundred fifty-nine million, nine hundred sixteen thousand, sixty-nine".