1606625775 has 36 divisors (see below), whose sum is σ = 2910014640. Its totient is φ = 847228800.

The previous prime is 1606625759. The next prime is 1606625791. The reversal of 1606625775 is 5775266061.

1606625775 is a `hidden beast` number, since 16 + 0 + 6 + 62 + 577 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1606625759) and next prime (1606625791).

It is not a de Polignac number, because 1606625775 - 2⁴ = 1606625759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1606625775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20091 + ... + 60140.

It is an arithmetic number, because the mean of its divisors is an integer number (80833740).

Almost surely, 2^1606625775 is an apocalyptic number.

1606625775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1606625775 is a deficient number, since it is larger than the sum of its proper divisors (1303388865).

1606625775 is a wasteful number, since it uses less digits than its factorization.

1606625775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80336 (or 80328 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 1606625775 is about 40082.7366206451. The cubic root of 1606625775 is about 1171.2193621070.

The spelling of 1606625775 in words is "one billion, six hundred six million, six hundred twenty-five thousand, seven hundred seventy-five".