1606566501 has 16 divisors (see below), whose sum is σ = 2406844800. Its totient is φ = 1059008544.

The previous prime is 1606566469. The next prime is 1606566517. The reversal of 1606566501 is 1056656061.

It is not a de Polignac number, because 1606566501 - 2⁵ = 1606566469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606566551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331881 + ... + 336686.

It is an arithmetic number, because the mean of its divisors is an integer number (150427800).

Almost surely, 2^1606566501 is an apocalyptic number.

It is an amenable number.

1606566501 is a deficient number, since it is larger than the sum of its proper divisors (800278299).

1606566501 is an equidigital number, since it uses as much as digits as its factorization.

1606566501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668665 (or 668659 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1606566501 is about 40081.9972182026. The cubic root of 1606566501 is about 1171.2049584810.

The spelling of 1606566501 in words is "one billion, six hundred six million, five hundred sixty-six thousand, five hundred one".