75000061 has 4 divisors (see below), whose sum is σ = 77586300. Its totient is φ = 72413824.

The previous prime is 75000047. The next prime is 75000071. The reversal of 75000061 is 16000057.

75000061 is nontrivially palindromic in base 9.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54479161 + 20520900 = 7381^2 + 4530^2 .

It is a cyclic number.

It is not a de Polignac number, because 75000061 - 2⁷ = 74999933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75000031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1293076 + ... + 1293133.

It is an arithmetic number, because the mean of its divisors is an integer number (19396575).

Almost surely, 2^75000061 is an apocalyptic number.

It is an amenable number.

75000061 is a deficient number, since it is larger than the sum of its proper divisors (2586239).

75000061 is a wasteful number, since it uses less digits than its factorization.

75000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586238.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 75000061 is about 8660.2575596803. The cubic root of 75000061 is about 421.7164469828.

The spelling of 75000061 in words is "seventy-five million, sixty-one", and thus it is an aban number and an uban number.