1606551607 has 4 divisors (see below), whose sum is σ = 1621566216. Its totient is φ = 1591537000.

The previous prime is 1606551601. The next prime is 1606551613. The reversal of 1606551607 is 7061556061.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1606551601) and next prime (1606551613).

It is a cyclic number.

It is not a de Polignac number, because 1606551607 - 2¹¹ = 1606549559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606551601) 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, 7507144 + ... + 7507357.

It is an arithmetic number, because the mean of its divisors is an integer number (405391554).

Almost surely, 2^1606551607 is an apocalyptic number.

1606551607 is a deficient number, since it is larger than the sum of its proper divisors (15014609).

1606551607 is a wasteful number, since it uses less digits than its factorization.

1606551607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014608.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1606551607 is about 40081.8114236370. The cubic root of 1606551607 is about 1171.2013391723.

The spelling of 1606551607 in words is "one billion, six hundred six million, five hundred fifty-one thousand, six hundred seven".