1669693730 has 8 divisors (see below), whose sum is σ = 3005448732. Its totient is φ = 667877488.

The previous prime is 1669693703. The next prime is 1669693771. The reversal of 1669693730 is 373969661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1646006041 + 23687689 = 40571^2 + 4867^2 .

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 83484677 + ... + 83484696.

Almost surely, 2^1669693730 is an apocalyptic number.

1669693730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1669693730 is a deficient number, since it is larger than the sum of its proper divisors (1335755002).

1669693730 is a wasteful number, since it uses less digits than its factorization.

1669693730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166969380.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The square root of 1669693730 is about 40861.8860308723. The cubic root of 1669693730 is about 1186.3484634586.

The spelling of 1669693730 in words is "one billion, six hundred sixty-nine million, six hundred ninety-three thousand, seven hundred thirty".