66097343920 has 20 divisors (see below), whose sum is σ = 153676324800. Its totient is φ = 26438937536.

The previous prime is 66097343909. The next prime is 66097343947. The reversal of 66097343920 is 2934379066.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413108320 + ... + 413108479.

It is an arithmetic number, because the mean of its divisors is an integer number (7683816240).

Almost surely, 2^66097343920 is an apocalyptic number.

It is an amenable number.

66097343920 is an abundant number, since it is smaller than the sum of its proper divisors (87578980880).

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

66097343920 is a wasteful number, since it uses less digits than its factorization.

66097343920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826216812 (or 826216806 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 49.

The spelling of 66097343920 in words is "sixty-six billion, ninety-seven million, three hundred forty-three thousand, nine hundred twenty".