666906834 has 32 divisors (see below), whose sum is σ = 1475573760. Its totient is φ = 199245200.

The previous prime is 666906809. The next prime is 666906847. The reversal of 666906834 is 438609666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66474 + ... + 75845.

It is an arithmetic number, because the mean of its divisors is an integer number (46111680).

Almost surely, 2^666906834 is an apocalyptic number.

666906834 is an abundant number, since it is smaller than the sum of its proper divisors (808666926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666906834 is a wasteful number, since it uses less digits than its factorization.

666906834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142406.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 666906834 is about 25824.5393763374. The cubic root of 666906834 is about 873.6853548870.

The spelling of 666906834 in words is "six hundred sixty-six million, nine hundred six thousand, eight hundred thirty-four".