666922047 has 8 divisors (see below), whose sum is σ = 970068480. Its totient is φ = 404195160.

The previous prime is 666922043. The next prime is 666922051. The reversal of 666922047 is 740229666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666922043) and next prime (666922051).

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

It is not a de Polignac number, because 666922047 - 2² = 666922043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666922043) 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, 10104847 + ... + 10104912.

It is an arithmetic number, because the mean of its divisors is an integer number (121258560).

Almost surely, 2^666922047 is an apocalyptic number.

666922047 is a deficient number, since it is larger than the sum of its proper divisors (303146433).

666922047 is a wasteful number, since it uses less digits than its factorization.

666922047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20209773.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 666922047 is about 25824.8339200855. The cubic root of 666922047 is about 873.6919981309.

The spelling of 666922047 in words is "six hundred sixty-six million, nine hundred twenty-two thousand, forty-seven".