66226745 has 8 divisors (see below), whose sum is σ = 85585416. Its totient is φ = 48905856.

The previous prime is 66226739. The next prime is 66226777. The reversal of 66226745 is 54762266.

It can be written as a sum of positive squares in 4 ways, for example, as 13402921 + 52823824 = 3661^2 + 7268^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66226745 - 2¹⁰ = 66225721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66226699 and 66226708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509372 + ... + 509501.

It is an arithmetic number, because the mean of its divisors is an integer number (10698177).

Almost surely, 2^66226745 is an apocalyptic number.

66226745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66226745 is a deficient number, since it is larger than the sum of its proper divisors (19358671).

66226745 is a wasteful number, since it uses less digits than its factorization.

66226745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018891.

The product of its digits is 120960, while the sum is 38.

The square root of 66226745 is about 8137.9816293722. The cubic root of 66226745 is about 404.5862665096.

The spelling of 66226745 in words is "sixty-six million, two hundred twenty-six thousand, seven hundred forty-five".