666622454 has 8 divisors (see below), whose sum is σ = 1000350648. Its totient is φ = 333172240.

The previous prime is 666622447. The next prime is 666622459. The reversal of 666622454 is 454226666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666622459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63392 + ... + 73155.

It is an arithmetic number, because the mean of its divisors is an integer number (125043831).

Almost surely, 2^666622454 is an apocalyptic number.

666622454 is a deficient number, since it is larger than the sum of its proper divisors (333728194).

666622454 is a wasteful number, since it uses less digits than its factorization.

666622454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138990.

The product of its digits is 414720, while the sum is 41.

The square root of 666622454 is about 25819.0327859120. The cubic root of 666622454 is about 873.5611526484.

The spelling of 666622454 in words is "six hundred sixty-six million, six hundred twenty-two thousand, four hundred fifty-four".