666046426 has 8 divisors (see below), whose sum is σ = 1009369620. Its totient is φ = 329589888.

The previous prime is 666046411. The next prime is 666046427. The reversal of 666046426 is 624640666.

It can be written as a sum of positive squares in 2 ways, for example, as 622552401 + 43494025 = 24951^2 + 6595^2 .

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

It is not an unprimeable number, because it can be changed into a prime (666046427) 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, 1716421 + ... + 1716808.

Almost surely, 2^666046426 is an apocalyptic number.

666046426 is a deficient number, since it is larger than the sum of its proper divisors (343323194).

666046426 is a wasteful number, since it uses less digits than its factorization.

666046426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433328.

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 666046426 is about 25807.8752709323. The cubic root of 666046426 is about 873.3094656117.

The spelling of 666046426 in words is "six hundred sixty-six million, forty-six thousand, four hundred twenty-six".