309666128007 has 8 divisors (see below), whose sum is σ = 424047310576. Its totient is φ = 200864515392.

The previous prime is 309666128003. The next prime is 309666128011. The reversal of 309666128007 is 700821666903.

It is an interprime number because it is at equal distance from previous prime (309666128003) and next prime (309666128011).

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

It is not a de Polignac number, because 309666128007 - 2² = 309666128003 is a prime.

It is a super-2 number, since 2×309666128007² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309666128003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394892358 + ... + 1394892579.

It is an arithmetic number, because the mean of its divisors is an integer number (53005913822).

Almost surely, 2^309666128007 is an apocalyptic number.

309666128007 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

309666128007 is a deficient number, since it is larger than the sum of its proper divisors (114381182569).

309666128007 is a wasteful number, since it uses less digits than its factorization.

309666128007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789784977.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 309666128007 in words is "three hundred nine billion, six hundred sixty-six million, one hundred twenty-eight thousand, seven".