258697660 has 24 divisors (see below), whose sum is σ = 585055296. Its totient is φ = 95519040.

The previous prime is 258697639. The next prime is 258697667. The reversal of 258697660 is 66796852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258697667) 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, 497236 + ... + 497755.

It is an arithmetic number, because the mean of its divisors is an integer number (24377304).

Almost surely, 2^258697660 is an apocalyptic number.

258697660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258697660 is an abundant number, since it is smaller than the sum of its proper divisors (326357636).

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

258697660 is a wasteful number, since it uses less digits than its factorization.

258697660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995013 (or 995011 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 258697660 is about 16084.0809498087. The cubic root of 258697660 is about 637.1829801441.

The spelling of 258697660 in words is "two hundred fifty-eight million, six hundred ninety-seven thousand, six hundred sixty".