67640286508 has 12 divisors (see below), whose sum is σ = 118390947192. Its totient is φ = 33814301600.

The previous prime is 67640286499. The next prime is 67640286509. The reversal of 67640286508 is 80568204676.

It is not an unprimeable number, because it can be changed into a prime (67640286509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434310 + ... + 1480717.

It is an arithmetic number, because the mean of its divisors is an integer number (9865912266).

Almost surely, 2^67640286508 is an apocalyptic number.

It is an amenable number.

67640286508 is a deficient number, since it is larger than the sum of its proper divisors (50750660684).

67640286508 is a wasteful number, since it uses less digits than its factorization.

67640286508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920832 (or 2920830 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 67640286508 in words is "sixty-seven billion, six hundred forty million, two hundred eighty-six thousand, five hundred eight".