66574966 has 8 divisors (see below), whose sum is σ = 99910440. Its totient is φ = 33271488.

The previous prime is 66574961. The next prime is 66574999. The reversal of 66574966 is 66947566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66574961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851 + ... + 11686.

It is an arithmetic number, because the mean of its divisors is an integer number (12488805).

Almost surely, 2^66574966 is an apocalyptic number.

66574966 is a deficient number, since it is larger than the sum of its proper divisors (33335474).

66574966 is a wasteful number, since it uses less digits than its factorization.

66574966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15998.

The product of its digits is 1632960, while the sum is 49.

The square root of 66574966 is about 8159.3483808451. The cubic root of 66574966 is about 405.2941337382.

The spelling of 66574966 in words is "sixty-six million, five hundred seventy-four thousand, nine hundred sixty-six".