1606646331 has 12 divisors (see below), whose sum is σ = 2395573440. Its totient is φ = 1036545840.

The previous prime is 1606646311. The next prime is 1606646339. The reversal of 1606646331 is 1336466061.

1606646331 is a `hidden beast` number, since 1 + 6 + 0 + 6 + 646 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 1606646331 - 2⁶ = 1606646267 is a prime.

It is a super-2 number, since 2×1606646331² = 5162624865831523122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1606646339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2879016 + ... + 2879573.

It is an arithmetic number, because the mean of its divisors is an integer number (199631120).

Almost surely, 2^1606646331 is an apocalyptic number.

1606646331 is a deficient number, since it is larger than the sum of its proper divisors (788927109).

1606646331 is a wasteful number, since it uses less digits than its factorization.

1606646331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758626 (or 5758623 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1606646331 is about 40082.9930394426. The cubic root of 1606646331 is about 1171.2243571475.

The spelling of 1606646331 in words is "one billion, six hundred six million, six hundred forty-six thousand, three hundred thirty-one".