667554614409 has 16 divisors (see below), whose sum is σ = 906125823680. Its totient is φ = 437033482560.

The previous prime is 667554614393. The next prime is 667554614477. The reversal of 667554614409 is 904416455766.

667554614409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667554614409 - 2⁴ = 667554614393 is a prime.

It is a super-4 number, since 4×667554614409⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667554610409) 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, 2833282 + ... + 3059835.

It is an arithmetic number, because the mean of its divisors is an integer number (56632863980).

Almost surely, 2^667554614409 is an apocalyptic number.

It is an amenable number.

667554614409 is a deficient number, since it is larger than the sum of its proper divisors (238571209271).

667554614409 is a wasteful number, since it uses less digits than its factorization.

667554614409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893800.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 667554614409 in words is "six hundred sixty-seven billion, five hundred fifty-four million, six hundred fourteen thousand, four hundred nine".