920016661 has 2 divisors, whose sum is σ = 920016662. Its totient is φ = 920016660.

The previous prime is 920016653. The next prime is 920016673. The reversal of 920016661 is 166610029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822599761 + 97416900 = 28681^2 + 9870^2 .

It is an emirp because it is prime and its reverse (166610029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920016661 - 2³ = 920016653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920016611) by changing a digit.

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, 460008330 + 460008331.

It is an arithmetic number, because the mean of its divisors is an integer number (460008331).

Almost surely, 2^920016661 is an apocalyptic number.

It is an amenable number.

920016661 is a deficient number, since it is larger than the sum of its proper divisors (1).

920016661 is an equidigital number, since it uses as much as digits as its factorization.

920016661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 920016661 is about 30331.7764234144. The cubic root of 920016661 is about 972.5946973075.

The spelling of 920016661 in words is "nine hundred twenty million, sixteen thousand, six hundred sixty-one".