67561968 has 40 divisors (see below), whose sum is σ = 175925248. Its totient is φ = 22341312.

The previous prime is 67561957. The next prime is 67561969. The reversal of 67561968 is 86916576.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67561969) 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, 555 + ... + 11637.

Almost surely, 2^67561968 is an apocalyptic number.

It is an amenable number.

67561968 is an abundant number, since it is smaller than the sum of its proper divisors (108363280).

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

67561968 is a wasteful number, since it uses less digits than its factorization.

67561968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221 (or 11215 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 67561968 is about 8219.6087498129. The cubic root of 67561968 is about 407.2872021805.

The spelling of 67561968 in words is "sixty-seven million, five hundred sixty-one thousand, nine hundred sixty-eight".