66553013447432 has 8 divisors (see below), whose sum is σ = 124786900213950. Its totient is φ = 33276506723712.

The previous prime is 66553013447387. The next prime is 66553013447443. The reversal of 66553013447432 is 23474431035566.

It can be written as a sum of positive squares in only one way, i.e., 66529373154916 + 23640292516 = 8156554^2 + 153754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159563340457 + ... + 4159563340472.

Almost surely, 2^{66553013447432} is an apocalyptic number.

It is an amenable number.

66553013447432 is a deficient number, since it is larger than the sum of its proper divisors (58233886766518).

66553013447432 is a wasteful number, since it uses less digits than its factorization.

66553013447432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8319126680935 (or 8319126680931 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 53.

The spelling of 66553013447432 in words is "sixty-six trillion, five hundred fifty-three billion, thirteen million, four hundred forty-seven thousand, four hundred thirty-two".