66403696740 has 48 divisors (see below), whose sum is σ = 185946573120. Its totient is φ = 17706107520.

The previous prime is 66403696729. The next prime is 66403696741. The reversal of 66403696740 is 4769630466.

It is not an unprimeable number, because it can be changed into a prime (66403696741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755826 + ... + 839094.

It is an arithmetic number, because the mean of its divisors is an integer number (3873886940).

Almost surely, 2^66403696740 is an apocalyptic number.

66403696740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66403696740 is an abundant number, since it is smaller than the sum of its proper divisors (119542876380).

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

66403696740 is a wasteful number, since it uses less digits than its factorization.

66403696740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96572 (or 96570 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 51.

The spelling of 66403696740 in words is "sixty-six billion, four hundred three million, six hundred ninety-six thousand, seven hundred forty".