67647626640 has 120 divisors (see below), whose sum is σ = 247836333888. Its totient is φ = 16399422720.

The previous prime is 67647626587. The next prime is 67647626663. The reversal of 67647626640 is 4662674676.

67647626640 is a `hidden beast` number, since 6 + 7 + 6 + 4 + 7 + 626 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4262764 + ... + 4278603.

Almost surely, 2^67647626640 is an apocalyptic number.

67647626640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67647626640 is an abundant number, since it is smaller than the sum of its proper divisors (180188707248).

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

67647626640 is a wasteful number, since it uses less digits than its factorization.

67647626640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541397 (or 8541388 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 67647626640 in words is "sixty-seven billion, six hundred forty-seven million, six hundred twenty-six thousand, six hundred forty".