667736555606146 has 8 divisors (see below), whose sum is σ = 1078651359056124. Its totient is φ = 308186102587440.

The previous prime is 667736555606083. The next prime is 667736555606149. The reversal of 667736555606146 is 641606555637766.

It can be written as a sum of positive squares in 2 ways, for example, as 660058053644025 + 7678501962121 = 25691595^2 + 2771011^2 .

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

It is not an unprimeable number, because it can be changed into a prime (667736555606149) 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, 12841087607785 + ... + 12841087607836.

Almost surely, 2^{667736555606146} is an apocalyptic number.

667736555606146 is a deficient number, since it is larger than the sum of its proper divisors (410914803449978).

667736555606146 is a wasteful number, since it uses less digits than its factorization.

667736555606146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25682175215636.

The product of its (nonzero) digits is 3429216000, while the sum is 73.

The spelling of 667736555606146 in words is "six hundred sixty-seven trillion, seven hundred thirty-six billion, five hundred fifty-five million, six hundred six thousand, one hundred forty-six".