66436438740 has 96 divisors (see below), whose sum is σ = 212724019200. Its totient is φ = 15176370816.

The previous prime is 66436438729. The next prime is 66436438759. The reversal of 66436438740 is 4783463466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 667029 + ... + 760131.

It is an arithmetic number, because the mean of its divisors is an integer number (2215875200).

Almost surely, 2^66436438740 is an apocalyptic number.

66436438740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66436438740 is an abundant number, since it is smaller than the sum of its proper divisors (146287580460).

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

66436438740 is a wasteful number, since it uses less digits than its factorization.

66436438740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94821 (or 94819 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 51.

The spelling of 66436438740 in words is "sixty-six billion, four hundred thirty-six million, four hundred thirty-eight thousand, seven hundred forty".