667644954 has 16 divisors (see below), whose sum is σ = 1378364160. Its totient is φ = 215369280.

The previous prime is 667644953. The next prime is 667644959. The reversal of 667644954 is 459446766.

It is a junction number, because it is equal to n+sod(n) for n = 667644897 and 667644906.

It is not an unprimeable number, because it can be changed into a prime (667644953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794559 + ... + 1794930.

It is an arithmetic number, because the mean of its divisors is an integer number (86147760).

Almost surely, 2^667644954 is an apocalyptic number.

667644954 is an abundant number, since it is smaller than the sum of its proper divisors (710719206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667644954 is a wasteful number, since it uses less digits than its factorization.

667644954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589525.

The product of its digits is 4354560, while the sum is 51.

The square root of 667644954 is about 25838.8264826404. The cubic root of 667644954 is about 874.0075622440.

The spelling of 667644954 in words is "six hundred sixty-seven million, six hundred forty-four thousand, nine hundred fifty-four".