66681467340 has 48 divisors (see below), whose sum is σ = 191754280032. Its totient is φ = 17301136896.

The previous prime is 66681467339. The next prime is 66681467351. The reversal of 66681467340 is 4376418666.

66681467340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15016129 + ... + 15020568.

It is an arithmetic number, because the mean of its divisors is an integer number (3994880834).

Almost surely, 2^66681467340 is an apocalyptic number.

66681467340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66681467340 is an abundant number, since it is smaller than the sum of its proper divisors (125072812692).

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

66681467340 is a wasteful number, since it uses less digits than its factorization.

66681467340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30036746 (or 30036744 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 66681467340 in words is "sixty-six billion, six hundred eighty-one million, four hundred sixty-seven thousand, three hundred forty".