66231321453 has 36 divisors (see below), whose sum is σ = 105911900640. Its totient is φ = 39851325360.

The previous prime is 66231321421. The next prime is 66231321461. The reversal of 66231321453 is 35412313266.

66231321453 is a `hidden beast` number, since 6 + 623 + 1 + 3 + 21 + 4 + 5 + 3 = 666.

It is not a de Polignac number, because 66231321453 - 2⁵ = 66231321421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231321553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 67401 + ... + 370142.

It is an arithmetic number, because the mean of its divisors is an integer number (2941997240).

Almost surely, 2^66231321453 is an apocalyptic number.

It is an amenable number.

66231321453 is a deficient number, since it is larger than the sum of its proper divisors (39680579187).

66231321453 is a wasteful number, since it uses less digits than its factorization.

66231321453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437710 (or 437696 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 66231321453 in words is "sixty-six billion, two hundred thirty-one million, three hundred twenty-one thousand, four hundred fifty-three".