73639966 has 8 divisors (see below), whose sum is σ = 111266640. Its totient is φ = 36551088.

The previous prime is 73639957. The next prime is 73639967. The reversal of 73639966 is 66993637.

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

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73639967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134106 + ... + 134653.

It is an arithmetic number, because the mean of its divisors is an integer number (13908330).

Almost surely, 2^73639966 is an apocalyptic number.

73639966 is a deficient number, since it is larger than the sum of its proper divisors (37626674).

73639966 is a wasteful number, since it uses less digits than its factorization.

73639966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268898.

The product of its digits is 1102248, while the sum is 49.

The square root of 73639966 is about 8581.3732001353. The cubic root of 73639966 is about 419.1516625439.

The spelling of 73639966 in words is "seventy-three million, six hundred thirty-nine thousand, nine hundred sixty-six".