666254434 has 8 divisors (see below), whose sum is σ = 1008550620. Its totient is φ = 330070896.

The previous prime is 666254417. The next prime is 666254461. The reversal of 666254434 is 434452666.

It can be written as a sum of positive squares in 2 ways, for example, as 665898025 + 356409 = 25805^2 + 597^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527889 + ... + 1528324.

Almost surely, 2^666254434 is an apocalyptic number.

666254434 is a deficient number, since it is larger than the sum of its proper divisors (342296186).

666254434 is a wasteful number, since it uses less digits than its factorization.

666254434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056324.

The product of its digits is 414720, while the sum is 40.

The square root of 666254434 is about 25811.9048890236. The cubic root of 666254434 is about 873.4003684081.

The spelling of 666254434 in words is "six hundred sixty-six million, two hundred fifty-four thousand, four hundred thirty-four".