66573628 has 12 divisors (see below), whose sum is σ = 127095192. Its totient is φ = 30260720.

The previous prime is 66573583. The next prime is 66573629. The reversal of 66573628 is 82637566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66573629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756475 + ... + 756562.

It is an arithmetic number, because the mean of its divisors is an integer number (10591266).

Almost surely, 2^66573628 is an apocalyptic number.

It is an amenable number.

66573628 is a deficient number, since it is larger than the sum of its proper divisors (60521564).

66573628 is a wasteful number, since it uses less digits than its factorization.

66573628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513052 (or 1513050 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 66573628 is about 8159.2663885916. The cubic root of 66573628 is about 405.2914185676.

The spelling of 66573628 in words is "sixty-six million, five hundred seventy-three thousand, six hundred twenty-eight".