66669580 has 24 divisors (see below), whose sum is σ = 148242528. Its totient is φ = 25099008.

The previous prime is 66669569. The next prime is 66669583. The reversal of 66669580 is 8596666.

66669580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66669580.

It is not an unprimeable number, because it can be changed into a prime (66669583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97704 + ... + 98383.

It is an arithmetic number, because the mean of its divisors is an integer number (6176772).

Almost surely, 2^66669580 is an apocalyptic number.

It is an amenable number.

66669580 is an abundant number, since it is smaller than the sum of its proper divisors (81572948).

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

66669580 is a wasteful number, since it uses less digits than its factorization.

66669580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196113 (or 196111 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 66669580 is about 8165.1442118312. The cubic root of 66669580 is about 405.4860394461.

The spelling of 66669580 in words is "sixty-six million, six hundred sixty-nine thousand, five hundred eighty".