66153533081 has 8 divisors (see below), whose sum is σ = 69644625600. Its totient is φ = 62663373360.

The previous prime is 66153533029. The next prime is 66153533101. The reversal of 66153533081 is 18033535166.

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 66153533081 - 2³⁴ = 48973663897 is a prime.

It is a super-2 number, since 2×66153533081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66153533021) 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, 85205 + ... + 373586.

It is an arithmetic number, because the mean of its divisors is an integer number (8705578200).

Almost surely, 2^66153533081 is an apocalyptic number.

It is an amenable number.

66153533081 is a deficient number, since it is larger than the sum of its proper divisors (3491092519).

66153533081 is a wasteful number, since it uses less digits than its factorization.

66153533081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466399.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 66153533081 in words is "sixty-six billion, one hundred fifty-three million, five hundred thirty-three thousand, eighty-one".