667279661145 has 8 divisors (see below), whose sum is σ = 1067647457856. Its totient is φ = 355882485936.

The previous prime is 667279661137. The next prime is 667279661183. The reversal of 667279661145 is 541166972766.

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

It is not a de Polignac number, because 667279661145 - 2³ = 667279661137 is a prime.

It is a super-2 number, since 2×667279661145² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22242655357 + ... + 22242655386.

It is an arithmetic number, because the mean of its divisors is an integer number (133455932232).

Almost surely, 2^667279661145 is an apocalyptic number.

It is an amenable number.

667279661145 is a deficient number, since it is larger than the sum of its proper divisors (400367796711).

667279661145 is a wasteful number, since it uses less digits than its factorization.

667279661145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44485310751.

The product of its digits is 22861440, while the sum is 60.

The spelling of 667279661145 in words is "six hundred sixty-seven billion, two hundred seventy-nine million, six hundred sixty-one thousand, one hundred forty-five".