407685666 has 16 divisors (see below), whose sum is σ = 834333984. Its totient is φ = 132734784.

The previous prime is 407685659. The next prime is 407685671. The reversal of 407685666 is 666586704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789831 + ... + 790346.

It is an arithmetic number, because the mean of its divisors is an integer number (52145874).

Almost surely, 2^407685666 is an apocalyptic number.

407685666 is an abundant number, since it is smaller than the sum of its proper divisors (426648318).

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

407685666 is a wasteful number, since it uses less digits than its factorization.

407685666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580225.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The square root of 407685666 is about 20191.2274515444. The cubic root of 407685666 is about 741.4954334203.

The spelling of 407685666 in words is "four hundred seven million, six hundred eighty-five thousand, six hundred sixty-six".