1669926725 has 6 divisors (see below), whose sum is σ = 2070709170. Its totient is φ = 1335941360.

The previous prime is 1669926719. The next prime is 1669926751. The reversal of 1669926725 is 5276299661.

It can be written as a sum of positive squares in 3 ways, for example, as 457703236 + 1212223489 = 21394^2 + 34817^2 .

It is not a de Polignac number, because 1669926725 - 2²⁶ = 1602817861 is a prime.

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, 33398510 + ... + 33398559.

It is an arithmetic number, because the mean of its divisors is an integer number (345118195).

Almost surely, 2^1669926725 is an apocalyptic number.

It is an amenable number.

1669926725 is a deficient number, since it is larger than the sum of its proper divisors (400782445).

1669926725 is an equidigital number, since it uses as much as digits as its factorization.

1669926725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66797079 (or 66797074 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 53.

The square root of 1669926725 is about 40864.7369378539. The cubic root of 1669926725 is about 1186.4036433197.

The spelling of 1669926725 in words is "one billion, six hundred sixty-nine million, nine hundred twenty-six thousand, seven hundred twenty-five".