75055681 has 16 divisors (see below), whose sum is σ = 82931200. Its totient is φ = 67651200.

The previous prime is 75055661. The next prime is 75055709. The reversal of 75055681 is 18655057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75055681 is a prime.

It is a super-2 number, since 2×75055681² = 11266710500747522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75055681.

It is not an unprimeable number, because it can be changed into a prime (75055661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34885 + ... + 36973.

It is an arithmetic number, because the mean of its divisors is an integer number (5183200).

Almost surely, 2^75055681 is an apocalyptic number.

It is an amenable number.

75055681 is a deficient number, since it is larger than the sum of its proper divisors (7875519).

75055681 is a wasteful number, since it uses less digits than its factorization.

75055681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 75055681 is about 8663.4681854324. The cubic root of 75055681 is about 421.8206694442.

The spelling of 75055681 in words is "seventy-five million, fifty-five thousand, six hundred eighty-one".