67891061 has 8 divisors (see below), whose sum is σ = 77751744. Its totient is φ = 58070880.

The previous prime is 67891051. The next prime is 67891073. The reversal of 67891061 is 16019876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-67891061 is a prime.

It is a super-3 number, since 3×67891061³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67891051) 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, 6440 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (9718968).

Almost surely, 2^67891061 is an apocalyptic number.

It is an amenable number.

67891061 is a deficient number, since it is larger than the sum of its proper divisors (9860683).

67891061 is a wasteful number, since it uses less digits than its factorization.

67891061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20251.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 67891061 is about 8239.6032064657. The cubic root of 67891061 is about 407.9474273059.

The spelling of 67891061 in words is "sixty-seven million, eight hundred ninety-one thousand, sixty-one".