75520751 has 2 divisors, whose sum is σ = 75520752. Its totient is φ = 75520750.

The previous prime is 75520747. The next prime is 75520789. The reversal of 75520751 is 15702557.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75520751 - 2² = 75520747 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75520721) by changing a digit.

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 as a sum of consecutive naturals, namely, 37760375 + 37760376.

It is an arithmetic number, because the mean of its divisors is an integer number (37760376).

Almost surely, 2^75520751 is an apocalyptic number.

75520751 is a deficient number, since it is larger than the sum of its proper divisors (1).

75520751 is an equidigital number, since it uses as much as digits as its factorization.

75520751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 75520751 is about 8690.2676023239. The cubic root of 75520751 is about 422.6901232254.

The spelling of 75520751 in words is "seventy-five million, five hundred twenty thousand, seven hundred fifty-one".