73155661 has 8 divisors (see below), whose sum is σ = 75801600. Its totient is φ = 70518000.

The previous prime is 73155553. The next prime is 73155673. The reversal of 73155661 is 16655137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73155661 - 2¹³ = 73147469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73155961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20100 + ... + 23458.

It is an arithmetic number, because the mean of its divisors is an integer number (9475200).

Almost surely, 2^73155661 is an apocalyptic number.

It is an amenable number.

73155661 is a deficient number, since it is larger than the sum of its proper divisors (2645939).

73155661 is a wasteful number, since it uses less digits than its factorization.

73155661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its digits is 18900, while the sum is 34.

The square root of 73155661 is about 8553.1082654202. The cubic root of 73155661 is about 418.2307681587.

The spelling of 73155661 in words is "seventy-three million, one hundred fifty-five thousand, six hundred sixty-one".