667437374409 has 32 divisors (see below), whose sum is σ = 985421216640. Its totient is φ = 399163894272.

The previous prime is 667437374407. The next prime is 667437374437. The reversal of 667437374409 is 904473734766.

It is not a de Polignac number, because 667437374409 - 2¹ = 667437374407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667437374407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970309 + ... + 1508765.

It is an arithmetic number, because the mean of its divisors is an integer number (30794413020).

Almost surely, 2^667437374409 is an apocalyptic number.

It is an amenable number.

667437374409 is a deficient number, since it is larger than the sum of its proper divisors (317983842231).

667437374409 is a wasteful number, since it uses less digits than its factorization.

667437374409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539369.

The product of its (nonzero) digits is 64012032, while the sum is 60.

It can be divided in two parts, 667437 and 374409, that added together give a triangular number (1041846 = T₁₄₄₃).

The spelling of 667437374409 in words is "six hundred sixty-seven billion, four hundred thirty-seven million, three hundred seventy-four thousand, four hundred nine".