67640286507 has 16 divisors (see below), whose sum is σ = 91092199968. Its totient is φ = 44641068800.

The previous prime is 67640286499. The next prime is 67640286509. The reversal of 67640286507 is 70568204676.

It is a cyclic number.

It is not a de Polignac number, because 67640286507 - 2³ = 67640286499 is a prime.

It is a super-2 number, since 2×67640286507² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67640286507.

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 15 ways as a sum of consecutive naturals, for example, 4280473 + ... + 4296245.

It is an arithmetic number, because the mean of its divisors is an integer number (5693262498).

Almost surely, 2^67640286507 is an apocalyptic number.

67640286507 is a deficient number, since it is larger than the sum of its proper divisors (23451913461).

67640286507 is a wasteful number, since it uses less digits than its factorization.

67640286507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30030.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 67640286507 in words is "sixty-seven billion, six hundred forty million, two hundred eighty-six thousand, five hundred seven".