75475661 has 8 divisors (see below), whose sum is σ = 78201120. Its totient is φ = 72758448.

The previous prime is 75475637. The next prime is 75475663. The reversal of 75475661 is 16657457.

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

It is a de Polignac number, because none of the positive numbers 2^k-75475661 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 (75475663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21170 + ... + 24476.

It is an arithmetic number, because the mean of its divisors is an integer number (9775140).

Almost surely, 2^75475661 is an apocalyptic number.

It is an amenable number.

75475661 is a deficient number, since it is larger than the sum of its proper divisors (2725459).

75475661 is a wasteful number, since it uses less digits than its factorization.

75475661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123.

The product of its digits is 176400, while the sum is 41.

The square root of 75475661 is about 8687.6729335306. The cubic root of 75475661 is about 422.6059834723.

The spelling of 75475661 in words is "seventy-five million, four hundred seventy-five thousand, six hundred sixty-one".