1669311617 has 8 divisors (see below), whose sum is σ = 1769593896. Its totient is φ = 1569261312.

The previous prime is 1669311607. The next prime is 1669311649. The reversal of 1669311617 is 7161139661.

It can be written as a sum of positive squares in 4 ways, for example, as 564347536 + 1104964081 = 23756^2 + 33241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1669311617 - 2¹⁰ = 1669310593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669311607) 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, 43058 + ... + 72059.

It is an arithmetic number, because the mean of its divisors is an integer number (221199237).

Almost surely, 2^1669311617 is an apocalyptic number.

1669311617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1669311617 is a deficient number, since it is larger than the sum of its proper divisors (100282279).

1669311617 is a wasteful number, since it uses less digits than its factorization.

1669311617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115987.

The product of its digits is 40824, while the sum is 41.

The square root of 1669311617 is about 40857.2100980965. The cubic root of 1669311617 is about 1186.2579570886.

The spelling of 1669311617 in words is "one billion, six hundred sixty-nine million, three hundred eleven thousand, six hundred seventeen".