75125665 has 4 divisors (see below), whose sum is σ = 90150804. Its totient is φ = 60100528.

The previous prime is 75125647. The next prime is 75125717. The reversal of 75125665 is 56652157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56652157 = 6287 ⋅9011.

It can be written as a sum of positive squares in 2 ways, for example, as 11397376 + 63728289 = 3376^2 + 7983^2 .

It is a cyclic number.

It is not a de Polignac number, because 75125665 - 2¹⁷ = 74994593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7512562 + ... + 7512571.

It is an arithmetic number, because the mean of its divisors is an integer number (22537701).

Almost surely, 2^75125665 is an apocalyptic number.

It is an amenable number.

75125665 is a deficient number, since it is larger than the sum of its proper divisors (15025139).

75125665 is a wasteful number, since it uses less digits than its factorization.

75125665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15025138.

The product of its digits is 63000, while the sum is 37.

The square root of 75125665 is about 8667.5062734330. The cubic root of 75125665 is about 421.9517344828.

The spelling of 75125665 in words is "seventy-five million, one hundred twenty-five thousand, six hundred sixty-five".