66577012 has 6 divisors (see below), whose sum is σ = 116509778. Its totient is φ = 33288504.

The previous prime is 66577003. The next prime is 66577031. The reversal of 66577012 is 21077566.

It can be written as a sum of positive squares in only one way, i.e., 50608996 + 15968016 = 7114^2 + 3996^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322123 + ... + 8322130.

Almost surely, 2^66577012 is an apocalyptic number.

It is an amenable number.

66577012 is a deficient number, since it is larger than the sum of its proper divisors (49932766).

66577012 is a wasteful number, since it uses less digits than its factorization.

66577012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16644257 (or 16644255 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66577012 is about 8159.4737575410. The cubic root of 66577012 is about 405.2982855656.

It can be divided in two parts, 665 and 77012, that added together give a palindrome (77677).

The spelling of 66577012 in words is "sixty-six million, five hundred seventy-seven thousand, twelve".