75666424 has 16 divisors (see below), whose sum is σ = 142144920. Its totient is φ = 37761120.

The previous prime is 75666421. The next prime is 75666427. The reversal of 75666424 is 42466657.

It is an interprime number because it is at equal distance from previous prime (75666421) and next prime (75666427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75666421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4414 + ... + 13069.

Almost surely, 2^75666424 is an apocalyptic number.

It is an amenable number.

75666424 is a deficient number, since it is larger than the sum of its proper divisors (66478496).

75666424 is a wasteful number, since it uses less digits than its factorization.

75666424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18030 (or 18026 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

The square root of 75666424 is about 8698.6449519451. The cubic root of 75666424 is about 422.9617262361.

The spelling of 75666424 in words is "seventy-five million, six hundred sixty-six thousand, four hundred twenty-four".