75169661 has 4 divisors (see below), whose sum is σ = 85908192. Its totient is φ = 64431132.

The previous prime is 75169657. The next prime is 75169691. The reversal of 75169661 is 16696157.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16696157 = 1489 ⋅11213.

It is a cyclic number.

It is not a de Polignac number, because 75169661 - 2² = 75169657 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 (75169621) 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, 5369255 + ... + 5369268.

It is an arithmetic number, because the mean of its divisors is an integer number (21477048).

Almost surely, 2^75169661 is an apocalyptic number.

It is an amenable number.

75169661 is a deficient number, since it is larger than the sum of its proper divisors (10738531).

75169661 is a wasteful number, since it uses less digits than its factorization.

75169661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738530.

The product of its digits is 68040, while the sum is 41.

The square root of 75169661 is about 8670.0438868555. The cubic root of 75169661 is about 422.0340879003.

The spelling of 75169661 in words is "seventy-five million, one hundred sixty-nine thousand, six hundred sixty-one".