66567145620 has 48 divisors (see below), whose sum is σ = 196197906240. Its totient is φ = 16816962816.

The previous prime is 66567145613. The next prime is 66567145621. The reversal of 66567145620 is 2654176566.

It is a self number, because there is not a number n which added to its sum of digits gives 66567145620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66567145621) 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, 29194977 + ... + 29197256.

It is an arithmetic number, because the mean of its divisors is an integer number (4087456380).

Almost surely, 2^66567145620 is an apocalyptic number.

66567145620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66567145620 is an abundant number, since it is smaller than the sum of its proper divisors (129630760620).

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

66567145620 is a wasteful number, since it uses less digits than its factorization.

66567145620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58392264 (or 58392262 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 66567145620 in words is "sixty-six billion, five hundred sixty-seven million, one hundred forty-five thousand, six hundred twenty".