75065681 has 8 divisors (see below), whose sum is σ = 76885704. Its totient is φ = 73267200.

The previous prime is 75065677. The next prime is 75065687. The reversal of 75065681 is 18656057.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23814400 + 51251281 = 4880^2 + 7159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75065681 - 2² = 75065677 is a prime.

It is a super-2 number, since 2×75065681² = 11269712927987522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75065687) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1781 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (9610713).

Almost surely, 2^75065681 is an apocalyptic number.

It is an amenable number.

75065681 is a deficient number, since it is larger than the sum of its proper divisors (1820023).

75065681 is a wasteful number, since it uses less digits than its factorization.

75065681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10771.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 75065681 is about 8664.0453022823. The cubic root of 75065681 is about 421.8394022895.

The spelling of 75065681 in words is "seventy-five million, sixty-five thousand, six hundred eighty-one".