73660621 has 2 divisors, whose sum is σ = 73660622. Its totient is φ = 73660620.

The previous prime is 73660603. The next prime is 73660633. The reversal of 73660621 is 12606637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 25857225 = 6914^2 + 5085^2 .

It is a cyclic number.

It is not a de Polignac number, because 73660621 - 2¹³ = 73652429 is a prime.

It is a super-2 number, since 2×73660621² = 10851774172211282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73660021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36830310 + 36830311.

It is an arithmetic number, because the mean of its divisors is an integer number (36830311).

Almost surely, 2^73660621 is an apocalyptic number.

It is an amenable number.

73660621 is a deficient number, since it is larger than the sum of its proper divisors (1).

73660621 is an equidigital number, since it uses as much as digits as its factorization.

73660621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 73660621 is about 8582.5765944732. The cubic root of 73660621 is about 419.1908476438.

The spelling of 73660621 in words is "seventy-three million, six hundred sixty thousand, six hundred twenty-one".