66457004557740 has 96 divisors (see below), whose sum is σ = 198046330292160. Its totient is φ = 16592983228416.

The previous prime is 66457004557721. The next prime is 66457004557841. The reversal of 66457004557740 is 4775540075466.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 168595695 + ... + 168989414.

It is an arithmetic number, because the mean of its divisors is an integer number (2062982607210).

Almost surely, 2^{66457004557740} is an apocalyptic number.

66457004557740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66457004557740 is an abundant number, since it is smaller than the sum of its proper divisors (131589325734420).

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

66457004557740 is a wasteful number, since it uses less digits than its factorization.

66457004557740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337585331 (or 337585329 counting only the distinct ones).

The product of its (nonzero) digits is 98784000, while the sum is 60.

The spelling of 66457004557740 in words is "sixty-six trillion, four hundred fifty-seven billion, four million, five hundred fifty-seven thousand, seven hundred forty".