66673737 has 12 divisors (see below), whose sum is σ = 103714884. Its totient is φ = 41029920.

The previous prime is 66673723. The next prime is 66673751. The reversal of 66673737 is 73737666.

It is an interprime number because it is at equal distance from previous prime (66673723) and next prime (66673751).

It can be written as a sum of positive squares in 2 ways, for example, as 25918281 + 40755456 = 5091^2 + 6384^2 .

It is not a de Polignac number, because 66673737 - 2¹⁰ = 66672713 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66673692 and 66673701.

It is not an unprimeable number, because it can be changed into a prime (66673787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284814 + ... + 285047.

It is an arithmetic number, because the mean of its divisors is an integer number (8642907).

Almost surely, 2^66673737 is an apocalyptic number.

It is an amenable number.

66673737 is a deficient number, since it is larger than the sum of its proper divisors (37041147).

66673737 is a wasteful number, since it uses less digits than its factorization.

66673737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569880 (or 569877 counting only the distinct ones).

The product of its digits is 666792, while the sum is 45.

The square root of 66673737 is about 8165.3987655227. The cubic root of 66673737 is about 405.4944669300.

It can be divided in two parts, 6667 and 3737, that added together give a square (10404 = 102²).

The spelling of 66673737 in words is "sixty-six million, six hundred seventy-three thousand, seven hundred thirty-seven".