66669180 has 48 divisors (see below), whose sum is σ = 194793984. Its totient is φ = 17005120.

The previous prime is 66669151. The next prime is 66669181. The reversal of 66669180 is 8196666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66669181) 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, 22776 + ... + 25535.

It is an arithmetic number, because the mean of its divisors is an integer number (4058208).

Almost surely, 2^66669180 is an apocalyptic number.

66669180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66669180 is an abundant number, since it is smaller than the sum of its proper divisors (128124804).

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

66669180 is a wasteful number, since it uses less digits than its factorization.

66669180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48346 (or 48344 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 66669180 is about 8165.1197174322. The cubic root of 66669180 is about 405.4852285079.

The spelling of 66669180 in words is "sixty-six million, six hundred sixty-nine thousand, one hundred eighty".