68655580 has 48 divisors (see below), whose sum is σ = 167118336. Its totient is φ = 23204160.

The previous prime is 68655553. The next prime is 68655581. The reversal of 68655580 is 8555686.

It is a super-3 number, since 3×68655580³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68655581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6487 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (3481632).

Almost surely, 2^68655580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68655580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83559168).

68655580 is an abundant number, since it is smaller than the sum of its proper divisors (98462756).

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

68655580 is a wasteful number, since it uses less digits than its factorization.

68655580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The square root of 68655580 is about 8285.8662793941. The cubic root of 68655580 is about 409.4730092240.

The spelling of 68655580 in words is "sixty-eight million, six hundred fifty-five thousand, five hundred eighty".