67398881 has 16 divisors (see below), whose sum is σ = 75427200. Its totient is φ = 59704320.

The previous prime is 67398869. The next prime is 67398887. The reversal of 67398881 is 18889376.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 67398881 - 2¹⁰ = 67397857 is a prime.

It is a super-2 number, since 2×67398881² = 9085218320104322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67398887) 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, 112220 + ... + 112818.

It is an arithmetic number, because the mean of its divisors is an integer number (4714200).

Almost surely, 2^67398881 is an apocalyptic number.

It is an amenable number.

67398881 is a deficient number, since it is larger than the sum of its proper divisors (8028319).

67398881 is a wasteful number, since it uses less digits than its factorization.

67398881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its digits is 580608, while the sum is 50.

The square root of 67398881 is about 8209.6821497546. The cubic root of 67398881 is about 406.9592229550.

The spelling of 67398881 in words is "sixty-seven million, three hundred ninety-eight thousand, eight hundred eighty-one".