67561672 has 32 divisors (see below), whose sum is σ = 139968000. Its totient is φ = 30409984.

The previous prime is 67561657. The next prime is 67561721. The reversal of 67561672 is 27616576.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7672 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (4374000).

Almost surely, 2^67561672 is an apocalyptic number.

It is an amenable number.

67561672 is an abundant number, since it is smaller than the sum of its proper divisors (72406328).

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

67561672 is a wasteful number, since it uses less digits than its factorization.

67561672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21645 (or 21641 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 67561672 is about 8219.5907440699. The cubic root of 67561672 is about 407.2866073825.

The spelling of 67561672 in words is "sixty-seven million, five hundred sixty-one thousand, six hundred seventy-two".