667354407 has 16 divisors (see below), whose sum is σ = 937517568. Its totient is φ = 421423200.

The previous prime is 667354381. The next prime is 667354433. The reversal of 667354407 is 704453766.

It is a happy number.

667354407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (667354381) and next prime (667354433).

It is not a de Polignac number, because 667354407 - 2⁶ = 667354343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667354447) 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, 39844 + ... + 54057.

It is an arithmetic number, because the mean of its divisors is an integer number (58594848).

Almost surely, 2^667354407 is an apocalyptic number.

667354407 is a deficient number, since it is larger than the sum of its proper divisors (270163161).

667354407 is a wasteful number, since it uses less digits than its factorization.

667354407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94030.

The product of its (nonzero) digits is 423360, while the sum is 42.

The square root of 667354407 is about 25833.2035760182. The cubic root of 667354407 is about 873.8807597575.

The spelling of 667354407 in words is "six hundred sixty-seven million, three hundred fifty-four thousand, four hundred seven".