169660404 has 18 divisors (see below), whose sum is σ = 428863890. Its totient is φ = 56553456.

The previous prime is 169660399. The next prime is 169660423. The reversal of 169660404 is 404066961.

It can be written as a sum of positive squares in only one way, i.e., 169052004 + 608400 = 13002^2 + 780^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4712789 = 169660404 / (1 + 6 + 9 + 6 + 6 + 0 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2356359 + ... + 2356430.

Almost surely, 2^169660404 is an apocalyptic number.

It is an amenable number.

169660404 is an abundant number, since it is smaller than the sum of its proper divisors (259203486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169660404 is a wasteful number, since it uses less digits than its factorization.

169660404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712799 (or 4712794 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 169660404 is about 13025.3753880646. The cubic root of 169660404 is about 553.5967080576.

The spelling of 169660404 in words is "one hundred sixty-nine million, six hundred sixty thousand, four hundred four".