67861656 has 48 divisors (see below), whose sum is σ = 185499600. Its totient is φ = 22410432.

The previous prime is 67861649. The next prime is 67861657. The reversal of 67861656 is 65616876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67861657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3525 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (3864575).

Almost surely, 2^67861656 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 67861656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92749800).

67861656 is an abundant number, since it is smaller than the sum of its proper divisors (117637944).

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

67861656 is a wasteful number, since it uses less digits than its factorization.

67861656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8768 (or 8761 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 67861656 is about 8237.8186433060. The cubic root of 67861656 is about 407.8885220234. Note that the first 3 decimals are identical.

The spelling of 67861656 in words is "sixty-seven million, eight hundred sixty-one thousand, six hundred fifty-six".