75869666 has 4 divisors (see below), whose sum is σ = 113804502. Its totient is φ = 37934832.

The previous prime is 75869653. The next prime is 75869681. The reversal of 75869666 is 66696857.

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

It can be written as a sum of positive squares in only one way, i.e., 69239041 + 6630625 = 8321^2 + 2575^2 .

It is an unprimeable number.

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, 18967415 + ... + 18967418.

Almost surely, 2^75869666 is an apocalyptic number.

75869666 is a deficient number, since it is larger than the sum of its proper divisors (37934836).

75869666 is a wasteful number, since it uses less digits than its factorization.

75869666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37934835.

The product of its digits is 3265920, while the sum is 53.

The square root of 75869666 is about 8710.3195119353. The cubic root of 75869666 is about 423.3400831103.

The spelling of 75869666 in words is "seventy-five million, eight hundred sixty-nine thousand, six hundred sixty-six".