75775986 has 80 divisors (see below), whose sum is σ = 199539648. Its totient is φ = 21189600.

The previous prime is 75775867. The next prime is 75776011. The reversal of 75775986 is 68957757.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21531 + ... + 24801.

Almost surely, 2^75775986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75775986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99769824).

75775986 is an abundant number, since it is smaller than the sum of its proper divisors (123763662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75775986 is a wasteful number, since it uses less digits than its factorization.

75775986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3300 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 75775986 is about 8704.9403214497. The cubic root of 75775986 is about 423.1657717549.

The spelling of 75775986 in words is "seventy-five million, seven hundred seventy-five thousand, nine hundred eighty-six".