655511061 has 4 divisors (see below), whose sum is σ = 874014752. Its totient is φ = 437007372.

The previous prime is 655511053. The next prime is 655511071. The reversal of 655511061 is 160115556.

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.

It is not a de Polignac number, because 655511061 - 2³ = 655511053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655511071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109251841 + ... + 109251846.

It is an arithmetic number, because the mean of its divisors is an integer number (218503688).

Almost surely, 2^655511061 is an apocalyptic number.

It is an amenable number.

655511061 is a deficient number, since it is larger than the sum of its proper divisors (218503691).

655511061 is a wasteful number, since it uses less digits than its factorization.

655511061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218503690.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 655511061 is about 25602.9502401579. The cubic root of 655511061 is about 868.6803708941.

The spelling of 655511061 in words is "six hundred fifty-five million, five hundred eleven thousand, sixty-one".