75478775 has 6 divisors (see below), whose sum is σ = 93593712. Its totient is φ = 60383000.

The previous prime is 75478771. The next prime is 75478787. The reversal of 75478775 is 57787457.

It is a happy number.

It is not a de Polignac number, because 75478775 - 2² = 75478771 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 (75478771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1509551 + ... + 1509600.

It is an arithmetic number, because the mean of its divisors is an integer number (15598952).

Almost surely, 2^75478775 is an apocalyptic number.

75478775 is a deficient number, since it is larger than the sum of its proper divisors (18114937).

75478775 is a wasteful number, since it uses less digits than its factorization.

75478775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019161 (or 3019156 counting only the distinct ones).

The product of its digits is 1920800, while the sum is 50.

The square root of 75478775 is about 8687.8521511361. The cubic root of 75478775 is about 422.6117953986.

The spelling of 75478775 in words is "seventy-five million, four hundred seventy-eight thousand, seven hundred seventy-five".