66506566519832 has 64 divisors (see below), whose sum is σ = 126647762941440. Its totient is φ = 32737706496000.

The previous prime is 66506566519831. The next prime is 66506566519879. The reversal of 66506566519832 is 23891566560566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66506566519831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366747008 + ... + 366928304.

It is an arithmetic number, because the mean of its divisors is an integer number (1978871295960).

Almost surely, 2^{66506566519832} is an apocalyptic number.

It is an amenable number.

66506566519832 is a deficient number, since it is larger than the sum of its proper divisors (60141196421608).

66506566519832 is a wasteful number, since it uses less digits than its factorization.

66506566519832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183972 (or 183968 counting only the distinct ones).

The product of its (nonzero) digits is 419904000, while the sum is 68.

The spelling of 66506566519832 in words is "sixty-six trillion, five hundred six billion, five hundred sixty-six million, five hundred nineteen thousand, eight hundred thirty-two".