1606656556 has 6 divisors (see below), whose sum is σ = 2811648980. Its totient is φ = 803328276.

The previous prime is 1606656551. The next prime is 1606656631. The reversal of 1606656556 is 6556566061.

It is a super-2 number, since 2×1606656556² = 5162690577875562272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1606656551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200832066 + ... + 200832073.

Almost surely, 2^1606656556 is an apocalyptic number.

It is an amenable number.

1606656556 is a deficient number, since it is larger than the sum of its proper divisors (1204992424).

1606656556 is a wasteful number, since it uses less digits than its factorization.

1606656556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401664143 (or 401664141 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 1606656556 is about 40083.1205871000. The cubic root of 1606656556 is about 1171.2268417731.

The spelling of 1606656556 in words is "one billion, six hundred six million, six hundred fifty-six thousand, five hundred fifty-six".