73921766 has 4 divisors (see below), whose sum is σ = 110882652. Its totient is φ = 36960882.

The previous prime is 73921753. The next prime is 73921769. The reversal of 73921766 is 66712937.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73921769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18480440 + ... + 18480443.

It is an arithmetic number, because the mean of its divisors is an integer number (27720663).

Almost surely, 2^73921766 is an apocalyptic number.

73921766 is a deficient number, since it is larger than the sum of its proper divisors (36960886).

73921766 is a wasteful number, since it uses less digits than its factorization.

73921766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36960885.

The product of its digits is 95256, while the sum is 41.

The square root of 73921766 is about 8597.7768056632. The cubic root of 73921766 is about 419.6856415652.

The spelling of 73921766 in words is "seventy-three million, nine hundred twenty-one thousand, seven hundred sixty-six".