67740297981 has 16 divisors (see below), whose sum is σ = 96439174656. Its totient is φ = 42192135216.

The previous prime is 67740297973. The next prime is 67740297991. The reversal of 67740297981 is 18979204776.

It is not a de Polignac number, because 67740297981 - 2³ = 67740297973 is a prime.

It is a super-2 number, since 2×67740297981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67740297991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11412655 + ... + 11418588.

It is an arithmetic number, because the mean of its divisors is an integer number (6027448416).

Almost surely, 2^67740297981 is an apocalyptic number.

It is an amenable number.

67740297981 is a deficient number, since it is larger than the sum of its proper divisors (28698876675).

67740297981 is a wasteful number, since it uses less digits than its factorization.

67740297981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831312.

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 67740297981 in words is "sixty-seven billion, seven hundred forty million, two hundred ninety-seven thousand, nine hundred eighty-one".