1670990725 has 12 divisors (see below), whose sum is σ = 2075251104. Its totient is φ = 1334713520.

The previous prime is 1670990693. The next prime is 1670990791. The reversal of 1670990725 is 5270990761.

It is a happy number.

It is not a de Polignac number, because 1670990725 - 2⁵ = 1670990693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35479 + ... + 67828.

It is an arithmetic number, because the mean of its divisors is an integer number (172937592).

Almost surely, 2^1670990725 is an apocalyptic number.

It is an amenable number.

1670990725 is a deficient number, since it is larger than the sum of its proper divisors (404260379).

1670990725 is a wasteful number, since it uses less digits than its factorization.

1670990725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103964 (or 103959 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 1670990725 is about 40877.7534240814. The cubic root of 1670990725 is about 1186.6555636489.

The spelling of 1670990725 in words is "one billion, six hundred seventy million, nine hundred ninety thousand, seven hundred twenty-five".