66052907640 has 192 divisors, whose sum is σ = 221046939360. Its totient is φ = 17093514240.

The previous prime is 66052907621. The next prime is 66052907651. The reversal of 66052907640 is 4670925066.

66052907640 is a `hidden beast` number, since 6 + 60 + 529 + 0 + 7 + 64 + 0 = 666.

66052907640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5281795 + ... + 5294285.

Almost surely, 2^66052907640 is an apocalyptic number.

66052907640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66052907640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110523469680).

66052907640 is an abundant number, since it is smaller than the sum of its proper divisors (154994031720).

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

66052907640 is a wasteful number, since it uses less digits than its factorization.

66052907640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12942 (or 12935 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 66052907640 in words is "sixty-six billion, fifty-two million, nine hundred seven thousand, six hundred forty".