268667981 has 8 divisors (see below), whose sum is σ = 274083264. Its totient is φ = 263306880.

The previous prime is 268667969. The next prime is 268668007. The reversal of 268667981 is 189766862.

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

It is a cyclic number.

It is not a de Polignac number, because 268667981 - 2¹⁴ = 268651597 is a prime.

It is a super-2 number, since 2×268667981² = 144364968029232722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268667911) 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, 3455 + ... + 23436.

It is an arithmetic number, because the mean of its divisors is an integer number (34260408).

Almost surely, 2^268667981 is an apocalyptic number.

It is an amenable number.

268667981 is a deficient number, since it is larger than the sum of its proper divisors (5415283).

268667981 is a wasteful number, since it uses less digits than its factorization.

268667981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27091.

The product of its digits is 1741824, while the sum is 53.

The square root of 268667981 is about 16391.0945638173. The cubic root of 268667981 is about 645.2657847404.

The spelling of 268667981 in words is "two hundred sixty-eight million, six hundred sixty-seven thousand, nine hundred eighty-one".