66654320532 has 96 divisors (see below), whose sum is σ = 163348921344. Its totient is φ = 21127910400.

The previous prime is 66654320531. The next prime is 66654320533. The reversal of 66654320532 is 23502345666.

66654320532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66654320531) and next prime (66654320533).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66654320531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7517782 + ... + 7526642.

It is an arithmetic number, because the mean of its divisors is an integer number (1701551264).

Almost surely, 2^66654320532 is an apocalyptic number.

66654320532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66654320532 is an abundant number, since it is smaller than the sum of its proper divisors (96694600812).

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

66654320532 is a wasteful number, since it uses less digits than its factorization.

66654320532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9249 (or 9247 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 66654320532 in words is "sixty-six billion, six hundred fifty-four million, three hundred twenty thousand, five hundred thirty-two".