535771661 has 4 divisors (see below), whose sum is σ = 536485824. Its totient is φ = 535057500.

The previous prime is 535771657. The next prime is 535771669. The reversal of 535771661 is 166177535.

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: 166177535 = 5 ⋅33235507.

It is a cyclic number.

It is not a de Polignac number, because 535771661 - 2² = 535771657 is a prime.

It is a super-3 number, since 3×535771661³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535771669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355955 + ... + 357456.

It is an arithmetic number, because the mean of its divisors is an integer number (134121456).

Almost surely, 2^535771661 is an apocalyptic number.

It is an amenable number.

535771661 is a deficient number, since it is larger than the sum of its proper divisors (714163).

535771661 is an equidigital number, since it uses as much as digits as its factorization.

535771661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714162.

The product of its digits is 132300, while the sum is 41.

The square root of 535771661 is about 23146.7419089599. The cubic root of 535771661 is about 812.1942542239.

The spelling of 535771661 in words is "five hundred thirty-five million, seven hundred seventy-one thousand, six hundred sixty-one".