73885661 has 4 divisors (see below), whose sum is σ = 77774400. Its totient is φ = 69996924.

The previous prime is 73885639. The next prime is 73885663. The reversal of 73885661 is 16658837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73885661 - 2⁶ = 73885597 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 (73885663) 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 in 3 ways as a sum of consecutive naturals, for example, 1944341 + ... + 1944378.

It is an arithmetic number, because the mean of its divisors is an integer number (19443600).

Almost surely, 2^73885661 is an apocalyptic number.

It is an amenable number.

73885661 is a deficient number, since it is larger than the sum of its proper divisors (3888739).

73885661 is a wasteful number, since it uses less digits than its factorization.

73885661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888738.

The product of its digits is 241920, while the sum is 44.

The square root of 73885661 is about 8595.6768785245. The cubic root of 73885661 is about 419.6173025696.

The spelling of 73885661 in words is "seventy-three million, eight hundred eighty-five thousand, six hundred sixty-one".