66329589642 has 64 divisors (see below), whose sum is σ = 139341081600. Its totient is φ = 21022041600.

The previous prime is 66329589631. The next prime is 66329589643. The reversal of 66329589642 is 24698592366.

It is a happy number.

It is a super-2 number, since 2×66329589642² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66329589643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11899168 + ... + 11904740.

It is an arithmetic number, because the mean of its divisors is an integer number (2177204400).

Almost surely, 2^66329589642 is an apocalyptic number.

66329589642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66329589642 is an abundant number, since it is smaller than the sum of its proper divisors (73011491958).

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

66329589642 is a wasteful number, since it uses less digits than its factorization.

66329589642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719.

The product of its digits is 33592320, while the sum is 60.

The spelling of 66329589642 in words is "sixty-six billion, three hundred twenty-nine million, five hundred eighty-nine thousand, six hundred forty-two".