66655361523 has 8 divisors (see below), whose sum is σ = 94101686928. Its totient is φ = 41822971904.

The previous prime is 66655361519. The next prime is 66655361561. The reversal of 66655361523 is 32516355666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66655361523 - 2² = 66655361519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66655361593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653483886 + ... + 653483987.

It is an arithmetic number, because the mean of its divisors is an integer number (11762710866).

Almost surely, 2^66655361523 is an apocalyptic number.

66655361523 is a deficient number, since it is larger than the sum of its proper divisors (27446325405).

66655361523 is a wasteful number, since it uses less digits than its factorization.

66655361523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306967893.

The product of its digits is 2916000, while the sum is 48.

The spelling of 66655361523 in words is "sixty-six billion, six hundred fifty-five million, three hundred sixty-one thousand, five hundred twenty-three".