67281336397 has 8 divisors (see below), whose sum is σ = 73409469120. Its totient is φ = 61155144960.

The previous prime is 67281336391. The next prime is 67281336427. The reversal of 67281336397 is 79363318276.

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 67281336397 - 2¹¹ = 67281334349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67281336391) 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, 412372 + ... + 551917.

It is an arithmetic number, because the mean of its divisors is an integer number (9176183640).

Almost surely, 2^67281336397 is an apocalyptic number.

It is an amenable number.

67281336397 is a deficient number, since it is larger than the sum of its proper divisors (6128132723).

67281336397 is a wasteful number, since it uses less digits than its factorization.

67281336397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970643.

The product of its digits is 6858432, while the sum is 55.

The spelling of 67281336397 in words is "sixty-seven billion, two hundred eighty-one million, three hundred thirty-six thousand, three hundred ninety-seven".