73168661 has 2 divisors, whose sum is σ = 73168662. Its totient is φ = 73168660.

The previous prime is 73168657. The next prime is 73168691. The reversal of 73168661 is 16686137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 6027025 = 8194^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 73168661 - 2² = 73168657 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 (73168631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36584330 + 36584331.

It is an arithmetic number, because the mean of its divisors is an integer number (36584331).

Almost surely, 2^73168661 is an apocalyptic number.

It is an amenable number.

73168661 is a deficient number, since it is larger than the sum of its proper divisors (1).

73168661 is an equidigital number, since it uses as much as digits as its factorization.

73168661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 73168661 is about 8553.8681893048. The cubic root of 73168661 is about 418.2555403494.

The spelling of 73168661 in words is "seventy-three million, one hundred sixty-eight thousand, six hundred sixty-one".