68658580 has 24 divisors (see below), whose sum is σ = 152665128. Its totient is φ = 25847808.

The previous prime is 68658553. The next prime is 68658581. The reversal of 68658580 is 8585686.

It can be written as a sum of positive squares in 4 ways, for example, as 24940036 + 43718544 = 4994^2 + 6612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68658580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68658581) 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, 100629 + ... + 101308.

It is an arithmetic number, because the mean of its divisors is an integer number (6361047).

Almost surely, 2^68658580 is an apocalyptic number.

It is an amenable number.

68658580 is an abundant number, since it is smaller than the sum of its proper divisors (84006548).

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

68658580 is a wasteful number, since it uses less digits than its factorization.

68658580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201963 (or 201961 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The square root of 68658580 is about 8286.0473085784. The cubic root of 68658580 is about 409.4789732992.

The spelling of 68658580 in words is "sixty-eight million, six hundred fifty-eight thousand, five hundred eighty".