655105061 has 4 divisors (see below), whose sum is σ = 705497772. Its totient is φ = 604712352.

The previous prime is 655105057. The next prime is 655105103. The reversal of 655105061 is 160501556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301890625 + 353214436 = 17375^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 655105061 - 2² = 655105057 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 (655195061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25196336 + ... + 25196361.

It is an arithmetic number, because the mean of its divisors is an integer number (176374443).

Almost surely, 2^655105061 is an apocalyptic number.

It is an amenable number.

655105061 is a deficient number, since it is larger than the sum of its proper divisors (50392711).

655105061 is a wasteful number, since it uses less digits than its factorization.

655105061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50392710.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 655105061 is about 25595.0202383198. The cubic root of 655105061 is about 868.5009907179.

The spelling of 655105061 in words is "six hundred fifty-five million, one hundred five thousand, sixty-one".