661300207012 has 6 divisors (see below), whose sum is σ = 1157275362278. Its totient is φ = 330650103504.

The previous prime is 661300207003. The next prime is 661300207019. The reversal of 661300207012 is 210702003166.

It can be written as a sum of positive squares in only one way, i.e., 503384574016 + 157915632996 = 709496^2 + 397386^2 .

It is a super-2 number, since 2×661300207012² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661300207019) 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 as a sum of consecutive naturals, namely, 82662525873 + ... + 82662525880.

Almost surely, 2^661300207012 is an apocalyptic number.

It is an amenable number.

661300207012 is a deficient number, since it is larger than the sum of its proper divisors (495975155266).

661300207012 is a wasteful number, since it uses less digits than its factorization.

661300207012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165325051757 (or 165325051755 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 661300207012 in words is "six hundred sixty-one billion, three hundred million, two hundred seven thousand, twelve".