75661161 has 8 divisors (see below), whose sum is σ = 100999584. Its totient is φ = 50381760.

The previous prime is 75661153. The next prime is 75661163. The reversal of 75661161 is 16116657.

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

It is not a de Polignac number, because 75661161 - 2³ = 75661153 is a prime.

It is a super-2 number, since 2×75661161² = 11449222567735842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75661163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11671 + ... + 16956.

It is an arithmetic number, because the mean of its divisors is an integer number (12624948).

Almost surely, 2^75661161 is an apocalyptic number.

It is an amenable number.

75661161 is a deficient number, since it is larger than the sum of its proper divisors (25338423).

75661161 is a wasteful number, since it uses less digits than its factorization.

75661161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29511.

The product of its digits is 7560, while the sum is 33.

The square root of 75661161 is about 8698.3424283021. The cubic root of 75661161 is about 422.9519196004.

The spelling of 75661161 in words is "seventy-five million, six hundred sixty-one thousand, one hundred sixty-one".