1669374947738 has 8 divisors (see below), whose sum is σ = 2526222266388. Its totient is φ = 827300858944.

The previous prime is 1669374947731. The next prime is 1669374947743. The reversal of 1669374947738 is 8377494739661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1641517001089 + 27857946649 = 1281217^2 + 166907^2 .

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

It is a super-2 number, since 2×1669374947738² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1669374947731) 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, 3693307181 + ... + 3693307632.

Almost surely, 2^{1669374947738} is an apocalyptic number.

1669374947738 is a deficient number, since it is larger than the sum of its proper divisors (856847318650).

1669374947738 is a wasteful number, since it uses less digits than its factorization.

1669374947738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386614928.

The product of its digits is 1152216576, while the sum is 74.

The spelling of 1669374947738 in words is "one trillion, six hundred sixty-nine billion, three hundred seventy-four million, nine hundred forty-seven thousand, seven hundred thirty-eight".