66271687356 has 48 divisors (see below), whose sum is σ = 176753251584. Its totient is φ = 18931687296.

The previous prime is 66271687351. The next prime is 66271687357. The reversal of 66271687356 is 65378617266.

It is a super-2 number, since 2×66271687356² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66271687296 and 66271687305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66271687351) 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, 482791 + ... + 604673.

It is an arithmetic number, because the mean of its divisors is an integer number (3682359408).

Almost surely, 2^66271687356 is an apocalyptic number.

It is an amenable number.

66271687356 is an abundant number, since it is smaller than the sum of its proper divisors (110481564228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66271687356 is a wasteful number, since it uses less digits than its factorization.

66271687356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128370 (or 128368 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 57.

The spelling of 66271687356 in words is "sixty-six billion, two hundred seventy-one million, six hundred eighty-seven thousand, three hundred fifty-six".