66931346 has 8 divisors (see below), whose sum is σ = 106302780. Its totient is φ = 31497088.

The previous prime is 66931343. The next prime is 66931351. The reversal of 66931346 is 64313966.

It can be written as a sum of positive squares in 2 ways, for example, as 57078025 + 9853321 = 7555^2 + 3139^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66931343) 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, 984251 + ... + 984318.

Almost surely, 2^66931346 is an apocalyptic number.

66931346 is a deficient number, since it is larger than the sum of its proper divisors (39371434).

66931346 is a wasteful number, since it uses less digits than its factorization.

66931346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968588.

The product of its digits is 69984, while the sum is 38.

The square root of 66931346 is about 8181.1579864956. The cubic root of 66931346 is about 406.0160355076.

The spelling of 66931346 in words is "sixty-six million, nine hundred thirty-one thousand, three hundred forty-six".