75663457 has 2 divisors, whose sum is σ = 75663458. Its totient is φ = 75663456.

The previous prime is 75663449. The next prime is 75663473. The reversal of 75663457 is 75436657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69155856 + 6507601 = 8316^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 75663457 - 2³ = 75663449 is a prime.

It is not a weakly prime, because it can be changed into another prime (75663857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37831728 + 37831729.

It is an arithmetic number, because the mean of its divisors is an integer number (37831729).

Almost surely, 2^75663457 is an apocalyptic number.

It is an amenable number.

75663457 is a deficient number, since it is larger than the sum of its proper divisors (1).

75663457 is an equidigital number, since it uses as much as digits as its factorization.

75663457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 43.

The square root of 75663457 is about 8698.4744064692. The cubic root of 75663457 is about 422.9561978314.

The spelling of 75663457 in words is "seventy-five million, six hundred sixty-three thousand, four hundred fifty-seven".