1606066507 has 4 divisors (see below), whose sum is σ = 1657875136. Its totient is φ = 1554257880.

The previous prime is 1606066477. The next prime is 1606066519. The reversal of 1606066507 is 7056606061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7056606061 = 19 ⋅371400319.

It is a cyclic number.

It is not a de Polignac number, because 1606066507 - 2²⁷ = 1471848779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606066597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25904268 + ... + 25904329.

It is an arithmetic number, because the mean of its divisors is an integer number (414468784).

Almost surely, 2^1606066507 is an apocalyptic number.

1606066507 is a deficient number, since it is larger than the sum of its proper divisors (51808629).

1606066507 is an equidigital number, since it uses as much as digits as its factorization.

1606066507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51808628.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1606066507 is about 40075.7595935498. The cubic root of 1606066507 is about 1171.0834454673.

The spelling of 1606066507 in words is "one billion, six hundred six million, sixty-six thousand, five hundred seven".