258508661 has 8 divisors (see below), whose sum is σ = 283945920. Its totient is φ = 234254592.

The previous prime is 258508643. The next prime is 258508673. The reversal of 258508661 is 166805852.

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

It is a cyclic number.

It is not a de Polignac number, because 258508661 - 2¹⁰ = 258507637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258505661) 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, 295340 + ... + 296213.

It is an arithmetic number, because the mean of its divisors is an integer number (35493240).

Almost surely, 2^258508661 is an apocalyptic number.

It is an amenable number.

258508661 is a deficient number, since it is larger than the sum of its proper divisors (25437259).

258508661 is a wasteful number, since it uses less digits than its factorization.

258508661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591595.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 258508661 is about 16078.2045328451. The cubic root of 258508661 is about 637.0277715696.

The spelling of 258508661 in words is "two hundred fifty-eight million, five hundred eight thousand, six hundred sixty-one".