667667662473 has 16 divisors (see below), whose sum is σ = 1017457427456. Its totient is φ = 381502221840.

The previous prime is 667667662457. The next prime is 667667662513. The reversal of 667667662473 is 374266766766.

It is a happy number.

It is not a de Polignac number, because 667667662473 - 2⁴ = 667667662457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667667662433) 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, 549463 + ... + 1279548.

It is an arithmetic number, because the mean of its divisors is an integer number (63591089216).

Almost surely, 2^667667662473 is an apocalyptic number.

It is an amenable number.

667667662473 is a deficient number, since it is larger than the sum of its proper divisors (349789764983).

667667662473 is a wasteful number, since it uses less digits than its factorization.

667667662473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846404.

The product of its digits is 384072192, while the sum is 66.

The spelling of 667667662473 in words is "six hundred sixty-seven billion, six hundred sixty-seven million, six hundred sixty-two thousand, four hundred seventy-three".