75561727 has 8 divisors (see below), whose sum is σ = 80312960. Its totient is φ = 70887960.

The previous prime is 75561709. The next prime is 75561749. The reversal of 75561727 is 72716557.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75561727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75561727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75561767) 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, 17349 + ... + 21262.

It is an arithmetic number, because the mean of its divisors is an integer number (10039120).

Almost surely, 2^75561727 is an apocalyptic number.

75561727 is a deficient number, since it is larger than the sum of its proper divisors (4751233).

75561727 is a wasteful number, since it uses less digits than its factorization.

75561727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38733.

The product of its digits is 102900, while the sum is 40.

The square root of 75561727 is about 8692.6248624912. The cubic root of 75561727 is about 422.7665570474.

The spelling of 75561727 in words is "seventy-five million, five hundred sixty-one thousand, seven hundred twenty-seven".