1606606401 has 16 divisors (see below), whose sum is σ = 2169446400. Its totient is φ = 1057502160.

The previous prime is 1606606387. The next prime is 1606606423. The reversal of 1606606401 is 1046066061.

It is not a de Polignac number, because 1606606401 - 2⁷ = 1606606273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1606601401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67936 + ... + 88478.

It is an arithmetic number, because the mean of its divisors is an integer number (135590400).

Almost surely, 2^1606606401 is an apocalyptic number.

It is an amenable number.

1606606401 is a deficient number, since it is larger than the sum of its proper divisors (562839999).

1606606401 is a wasteful number, since it uses less digits than its factorization.

1606606401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20876.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1606606401 is about 40082.4949448010. The cubic root of 1606606401 is about 1171.2146542496.

The spelling of 1606606401 in words is "one billion, six hundred six million, six hundred six thousand, four hundred one".