67540664624 has 80 divisors (see below), whose sum is σ = 140932104768. Its totient is φ = 31243739136.

The previous prime is 67540664621. The next prime is 67540664677. The reversal of 67540664624 is 42646604576.

It is a super-2 number, since 2×67540664624² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67540664621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829394 + ... + 3846990.

Almost surely, 2^67540664624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67540664624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70466052384).

67540664624 is an abundant number, since it is smaller than the sum of its proper divisors (73391440144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67540664624 is a wasteful number, since it uses less digits than its factorization.

67540664624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17862 (or 17856 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 50.

The spelling of 67540664624 in words is "sixty-seven billion, five hundred forty million, six hundred sixty-four thousand, six hundred twenty-four".