412512666661 has 2 divisors, whose sum is σ = 412512666662. Its totient is φ = 412512666660.

The previous prime is 412512666637. The next prime is 412512666697. The reversal of 412512666661 is 166666215214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363596940100 + 48915726561 = 602990^2 + 221169^2 .

It is a cyclic number.

It is not a de Polignac number, because 412512666661 - 2¹⁹ = 412512142373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (412512616661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206256333330 + 206256333331.

It is an arithmetic number, because the mean of its divisors is an integer number (206256333331).

Almost surely, 2^412512666661 is an apocalyptic number.

It is an amenable number.

412512666661 is a deficient number, since it is larger than the sum of its proper divisors (1).

412512666661 is an equidigital number, since it uses as much as digits as its factorization.

412512666661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The spelling of 412512666661 in words is "four hundred twelve billion, five hundred twelve million, six hundred sixty-six thousand, six hundred sixty-one".