207428681667 has 16 divisors (see below), whose sum is σ = 277661347488. Its totient is φ = 137741399040.

The previous prime is 207428681639. The next prime is 207428681687. The reversal of 207428681667 is 766186824702.

It is not a de Polignac number, because 207428681667 - 2³⁴ = 190248812483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207428681687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638067 + ... + 1760147.

It is an arithmetic number, because the mean of its divisors is an integer number (17353834218).

Almost surely, 2^207428681667 is an apocalyptic number.

207428681667 is a deficient number, since it is larger than the sum of its proper divisors (70232665821).

207428681667 is a wasteful number, since it uses less digits than its factorization.

207428681667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124310.

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 207428681667 in words is "two hundred seven billion, four hundred twenty-eight million, six hundred eighty-one thousand, six hundred sixty-seven".