66475580 has 24 divisors (see below), whose sum is σ = 139850928. Its totient is φ = 26542208.

The previous prime is 66475579. The next prime is 66475583. The reversal of 66475580 is 8557466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66475583) 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, 9647 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (5827122).

Almost surely, 2^66475580 is an apocalyptic number.

It is an amenable number.

66475580 is an abundant number, since it is smaller than the sum of its proper divisors (73375348).

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

66475580 is a wasteful number, since it uses less digits than its factorization.

66475580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013 (or 6011 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 66475580 is about 8153.2557914001. The cubic root of 66475580 is about 405.0923530689.

The spelling of 66475580 in words is "sixty-six million, four hundred seventy-five thousand, five hundred eighty".