73501661 has 2 divisors, whose sum is σ = 73501662. Its totient is φ = 73501660.

The previous prime is 73501657. The next prime is 73501697. The reversal of 73501661 is 16610537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38514436 + 34987225 = 6206^2 + 5915^2 .

It is an emirp because it is prime and its reverse (16610537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73501661 - 2² = 73501657 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 (73501601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36750830 + 36750831.

It is an arithmetic number, because the mean of its divisors is an integer number (36750831).

Almost surely, 2^73501661 is an apocalyptic number.

It is an amenable number.

73501661 is a deficient number, since it is larger than the sum of its proper divisors (1).

73501661 is an equidigital number, since it uses as much as digits as its factorization.

73501661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 73501661 is about 8573.3109706810. The cubic root of 73501661 is about 418.8890918057.

The spelling of 73501661 in words is "seventy-three million, five hundred one thousand, six hundred sixty-one".