66737406700665 has 12 divisors (see below), whose sum is σ = 115678171614564. Its totient is φ = 35593283573664.

The previous prime is 66737406700637. The next prime is 66737406700673. The reversal of 66737406700665 is 56600760473766.

It can be written as a sum of positive squares in 2 ways, for example, as 26255898650601 + 40481508050064 = 5124051^2 + 6362508^2 .

It is not a de Polignac number, because 66737406700665 - 2⁷ = 66737406700537 is a prime.

It is a super-2 number, since 2×66737406700665² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741526741074 + ... + 741526741163.

It is an arithmetic number, because the mean of its divisors is an integer number (9639847634547).

Almost surely, 2^{66737406700665} is an apocalyptic number.

It is an amenable number.

66737406700665 is a deficient number, since it is larger than the sum of its proper divisors (48940764913899).

66737406700665 is a wasteful number, since it uses less digits than its factorization.

66737406700665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483053482248 (or 1483053482245 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 63.

The spelling of 66737406700665 in words is "sixty-six trillion, seven hundred thirty-seven billion, four hundred six million, seven hundred thousand, six hundred sixty-five".