67098665640 has 64 divisors (see below), whose sum is σ = 202339051200. Its totient is φ = 17800261632.

The previous prime is 67098665617. The next prime is 67098665651. The reversal of 67098665640 is 4656689076.

It is a happy number.

It is an unprimeable number.

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, 1425430 + ... + 1471749.

It is an arithmetic number, because the mean of its divisors is an integer number (3161547675).

Almost surely, 2^67098665640 is an apocalyptic number.

67098665640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67098665640 is an abundant number, since it is smaller than the sum of its proper divisors (135240385560).

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

67098665640 is a wasteful number, since it uses less digits than its factorization.

67098665640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897386 (or 2897382 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 67098665640 in words is "sixty-seven billion, ninety-eight million, six hundred sixty-five thousand, six hundred forty".