73646661 has 8 divisors (see below), whose sum is σ = 107122464. Its totient is φ = 44634320.

The previous prime is 73646653. The next prime is 73646681. The reversal of 73646661 is 16664637.

It is a happy number.

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 73646661 - 2³ = 73646653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73646611) 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, 1115826 + ... + 1115891.

It is an arithmetic number, because the mean of its divisors is an integer number (13390308).

Almost surely, 2^73646661 is an apocalyptic number.

It is an amenable number.

73646661 is a deficient number, since it is larger than the sum of its proper divisors (33475803).

73646661 is a wasteful number, since it uses less digits than its factorization.

73646661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231731.

The product of its digits is 108864, while the sum is 39.

The square root of 73646661 is about 8581.7632803521. The cubic root of 73646661 is about 419.1643645927.

The spelling of 73646661 in words is "seventy-three million, six hundred forty-six thousand, six hundred sixty-one".