75811066 has 4 divisors (see below), whose sum is σ = 113716602. Its totient is φ = 37905532.

The previous prime is 75811037. The next prime is 75811069. The reversal of 75811066 is 66011857.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66011857 = 607 ⋅108751.

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 23668225 = 7221^2 + 4865^2 .

It is not an unprimeable number, because it can be changed into a prime (75811069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18952765 + ... + 18952768.

Almost surely, 2^75811066 is an apocalyptic number.

75811066 is a deficient number, since it is larger than the sum of its proper divisors (37905536).

75811066 is a wasteful number, since it uses less digits than its factorization.

75811066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37905535.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 75811066 is about 8706.9550360617. The cubic root of 75811066 is about 423.2310622948.

The spelling of 75811066 in words is "seventy-five million, eight hundred eleven thousand, sixty-six".