1606654025 has 6 divisors (see below), whose sum is σ = 1992251022. Its totient is φ = 1285323200.

The previous prime is 1606654009. The next prime is 1606654039. The reversal of 1606654025 is 5204566061.

It can be written as a sum of positive squares in 3 ways, for example, as 24285184 + 1582368841 = 4928^2 + 39779^2 .

It is not a de Polignac number, because 1606654025 - 2⁴ = 1606654009 is a prime.

It is a Duffinian 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, 32133056 + ... + 32133105.

It is an arithmetic number, because the mean of its divisors is an integer number (332041837).

Almost surely, 2^1606654025 is an apocalyptic number.

It is an amenable number.

1606654025 is a deficient number, since it is larger than the sum of its proper divisors (385596997).

1606654025 is an equidigital number, since it uses as much as digits as its factorization.

1606654025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64266171 (or 64266166 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1606654025 is about 40083.0890151944. The cubic root of 1606654025 is about 1171.2262267533.

The spelling of 1606654025 in words is "one billion, six hundred six million, six hundred fifty-four thousand, twenty-five".