75161666 has 8 divisors (see below), whose sum is σ = 112834620. Its totient is φ = 37550128.

The previous prime is 75161633. The next prime is 75161683. The reversal of 75161666 is 66616157.

It can be written as a sum of positive squares in 2 ways, for example, as 66896041 + 8265625 = 8179^2 + 2875^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12161 + ... + 17268.

Almost surely, 2^75161666 is an apocalyptic number.

75161666 is a deficient number, since it is larger than the sum of its proper divisors (37672954).

75161666 is a wasteful number, since it uses less digits than its factorization.

75161666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30708.

The product of its digits is 45360, while the sum is 38.

The square root of 75161666 is about 8669.5828042646. The cubic root of 75161666 is about 422.0191249390.

The spelling of 75161666 in words is "seventy-five million, one hundred sixty-one thousand, six hundred sixty-six".