75243663 has 48 divisors (see below), whose sum is σ = 123042816. Its totient is φ = 43917120.

The previous prime is 75243647. The next prime is 75243671. The reversal of 75243663 is 36634257.

It is not a de Polignac number, because 75243663 - 2⁴ = 75243647 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

Its product of digits (90720) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75243643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 479181 + ... + 479337.

It is an arithmetic number, because the mean of its divisors is an integer number (2563392).

Almost surely, 2^75243663 is an apocalyptic number.

75243663 is a deficient number, since it is larger than the sum of its proper divisors (47799153).

75243663 is a wasteful number, since it uses less digits than its factorization.

75243663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 321 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 75243663 is about 8674.3105201509. The cubic root of 75243663 is about 422.1725352606.

The spelling of 75243663 in words is "seventy-five million, two hundred forty-three thousand, six hundred sixty-three".