1625106665 has 32 divisors (see below), whose sum is σ = 2423990016. Its totient is φ = 1018425600.

The previous prime is 1625106599. The next prime is 1625106667. The reversal of 1625106665 is 5666015261.

It is not a de Polignac number, because 1625106665 - 2⁸ = 1625106409 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1625106667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28274 + ... + 63636.

It is an arithmetic number, because the mean of its divisors is an integer number (75749688).

Almost surely, 2^1625106665 is an apocalyptic number.

It is an amenable number.

1625106665 is a deficient number, since it is larger than the sum of its proper divisors (798883351).

1625106665 is a wasteful number, since it uses less digits than its factorization.

1625106665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35489.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1625106665 is about 40312.6117362793. The cubic root of 1625106665 is about 1175.6930668991.

The spelling of 1625106665 in words is "one billion, six hundred twenty-five million, one hundred six thousand, six hundred sixty-five".