66734070020 has 24 divisors (see below), whose sum is σ = 141830002944. Its totient is φ = 26372017376.

The previous prime is 66734070019. The next prime is 66734070023. The reversal of 66734070020 is 2007043766.

It is a super-2 number, since 2×66734070020² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66734070023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20098964 + ... + 20102283.

It is an arithmetic number, because the mean of its divisors is an integer number (5909583456).

Almost surely, 2^66734070020 is an apocalyptic number.

It is an amenable number.

66734070020 is an abundant number, since it is smaller than the sum of its proper divisors (75095932924).

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

66734070020 is a wasteful number, since it uses less digits than its factorization.

66734070020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40201339 (or 40201337 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 66734070020 in words is "sixty-six billion, seven hundred thirty-four million, seventy thousand, twenty".