66270737 has 8 divisors (see below), whose sum is σ = 73297896. Its totient is φ = 59519232.

The previous prime is 66270733. The next prime is 66270749. The reversal of 66270737 is 73707266.

It can be written as a sum of positive squares in 4 ways, for example, as 919681 + 65351056 = 959^2 + 8084^2 .

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 66270737 - 2² = 66270733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66270737.

It is not an unprimeable number, because it can be changed into a prime (66270731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68408 + ... + 69369.

It is an arithmetic number, because the mean of its divisors is an integer number (9162237).

Almost surely, 2^66270737 is an apocalyptic number.

It is an amenable number.

66270737 is a deficient number, since it is larger than the sum of its proper divisors (7027159).

66270737 is a wasteful number, since it uses less digits than its factorization.

66270737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137827.

The product of its (nonzero) digits is 74088, while the sum is 38.

The square root of 66270737 is about 8140.6840621658. The cubic root of 66270737 is about 404.6758306251.

Subtracting 66270737 from its reverse (73707266), we obtain a square (7436529 = 2727²).

The spelling of 66270737 in words is "sixty-six million, two hundred seventy thousand, seven hundred thirty-seven".