75668387 has 4 divisors (see below), whose sum is σ = 75839640. Its totient is φ = 75497136.

The previous prime is 75668371. The next prime is 75668389. The reversal of 75668387 is 78386657.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75668387 - 2⁴ = 75668371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75668389) 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, 84962 + ... + 85847.

It is an arithmetic number, because the mean of its divisors is an integer number (18959910).

Almost surely, 2^75668387 is an apocalyptic number.

75668387 is a deficient number, since it is larger than the sum of its proper divisors (171253).

75668387 is a wasteful number, since it uses less digits than its factorization.

75668387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171252.

The product of its digits is 1693440, while the sum is 50.

The square root of 75668387 is about 8698.7577848794. The cubic root of 75668387 is about 422.9653838104.

The spelling of 75668387 in words is "seventy-five million, six hundred sixty-eight thousand, three hundred eighty-seven".