75477725 has 6 divisors (see below), whose sum is σ = 93592410. Its totient is φ = 60382160.

The previous prime is 75477719. The next prime is 75477733. The reversal of 75477725 is 52777457.

It can be written as a sum of positive squares in 3 ways, for example, as 1207801 + 74269924 = 1099^2 + 8618^2 .

It is not a de Polignac number, because 75477725 - 2¹⁶ = 75412189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1509530 + ... + 1509579.

It is an arithmetic number, because the mean of its divisors is an integer number (15598735).

Almost surely, 2^75477725 is an apocalyptic number.

It is an amenable number.

75477725 is a deficient number, since it is larger than the sum of its proper divisors (18114685).

75477725 is a wasteful number, since it uses less digits than its factorization.

75477725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019119 (or 3019114 counting only the distinct ones).

The product of its digits is 480200, while the sum is 44.

The square root of 75477725 is about 8687.7917217208. The cubic root of 75477725 is about 422.6098357111.

The spelling of 75477725 in words is "seventy-five million, four hundred seventy-seven thousand, seven hundred twenty-five".