73666906 has 8 divisors (see below), whose sum is σ = 110572020. Its totient is φ = 36809568.

The previous prime is 73666867. The next prime is 73666919. The reversal of 73666906 is 60966637.

It can be written as a sum of positive squares in 2 ways, for example, as 70408881 + 3258025 = 8391^2 + 1805^2 .

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

It is a super-2 number, since 2×73666906² = 10853626079225672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7801 + ... + 14428.

Almost surely, 2^73666906 is an apocalyptic number.

73666906 is a deficient number, since it is larger than the sum of its proper divisors (36905114).

73666906 is a wasteful number, since it uses less digits than its factorization.

73666906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23888.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 73666906 is about 8582.9427354492. The cubic root of 73666906 is about 419.2027696156.

The spelling of 73666906 in words is "seventy-three million, six hundred sixty-six thousand, nine hundred six".