258000066 has 40 divisors (see below), whose sum is σ = 598057020. Its totient is φ = 83032992.

The previous prime is 258000059. The next prime is 258000077. The reversal of 258000066 is 660000852.

It can be written as a sum of positive squares in 2 ways, for example, as 256928841 + 1071225 = 16029^2 + 1035^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22761 + ... + 32156.

Almost surely, 2^258000066 is an apocalyptic number.

258000066 is an abundant number, since it is smaller than the sum of its proper divisors (340056954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258000066 is a wasteful number, since it uses less digits than its factorization.

258000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54960 (or 54951 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 258000066 is about 16062.3804586991. The cubic root of 258000066 is about 636.6097303262.

The spelling of 258000066 in words is "two hundred fifty-eight million, sixty-six", and thus it is an aban number.