667405435127 has 16 divisors (see below), whose sum is σ = 693769774464. Its totient is φ = 641578560000.

The previous prime is 667405435069. The next prime is 667405435129. The reversal of 667405435127 is 721534504766.

It is a cyclic number.

It is not a de Polignac number, because 667405435127 - 2¹⁸ = 667405172983 is a prime.

It is a super-2 number, since 2×667405435127² (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 (667405435129) 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, 1843727 + ... + 2175807.

It is an arithmetic number, because the mean of its divisors is an integer number (43360610904).

Almost surely, 2^667405435127 is an apocalyptic number.

667405435127 is a deficient number, since it is larger than the sum of its proper divisors (26364339337).

667405435127 is a wasteful number, since it uses less digits than its factorization.

667405435127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332890.

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 667405435127 in words is "six hundred sixty-seven billion, four hundred five million, four hundred thirty-five thousand, one hundred twenty-seven".