575151661 has 8 divisors (see below), whose sum is σ = 670731200. Its totient is φ = 492986844.

The previous prime is 575151653. The next prime is 575151683. The reversal of 575151661 is 166151575.

It is not a de Polignac number, because 575151661 - 2³ = 575151653 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 575151661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (575151611) 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, 838071 + ... + 838756.

It is an arithmetic number, because the mean of its divisors is an integer number (83841400).

Almost surely, 2^575151661 is an apocalyptic number.

It is an amenable number.

575151661 is a deficient number, since it is larger than the sum of its proper divisors (95579539).

575151661 is an equidigital number, since it uses as much as digits as its factorization.

575151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676848 (or 1676834 counting only the distinct ones).

The product of its digits is 31500, while the sum is 37.

The square root of 575151661 is about 23982.3197585221. The cubic root of 575151661 is about 831.6248525413.

The spelling of 575151661 in words is "five hundred seventy-five million, one hundred fifty-one thousand, six hundred sixty-one".