73865966 has 4 divisors (see below), whose sum is σ = 110798952. Its totient is φ = 36932982.

The previous prime is 73865951. The next prime is 73865989. The reversal of 73865966 is 66956837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66956837 = 6691 ⋅10007.

It is a super-2 number, since 2×73865966² = 10912361866226312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18466490 + ... + 18466493.

It is an arithmetic number, because the mean of its divisors is an integer number (27699738).

Almost surely, 2^73865966 is an apocalyptic number.

73865966 is a deficient number, since it is larger than the sum of its proper divisors (36932986).

73865966 is a wasteful number, since it uses less digits than its factorization.

73865966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36932985.

The product of its digits is 1632960, while the sum is 50.

The square root of 73865966 is about 8594.5311681324. The cubic root of 73865966 is about 419.5800147879.

The spelling of 73865966 in words is "seventy-three million, eight hundred sixty-five thousand, nine hundred sixty-six".