1665106500404 has 6 divisors (see below), whose sum is σ = 2913936375714. Its totient is φ = 832553250200.

The previous prime is 1665106500403. The next prime is 1665106500419. The reversal of 1665106500404 is 4040056015661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1222152360100 + 442954140304 = 1105510^2 + 665548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665106500403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208138312547 + ... + 208138312554.

It is an arithmetic number, because the mean of its divisors is an integer number (485656062619).

Almost surely, 2^{1665106500404} is an apocalyptic number.

It is an amenable number.

1665106500404 is a deficient number, since it is larger than the sum of its proper divisors (1248829875310).

1665106500404 is a wasteful number, since it uses less digits than its factorization.

1665106500404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416276625105 (or 416276625103 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1665106500404 in words is "one trillion, six hundred sixty-five billion, one hundred six million, five hundred thousand, four hundred four".