421709166 has 20 divisors (see below), whose sum is σ = 944941272. Its totient is φ = 140569668.

The previous prime is 421709147. The next prime is 421709177. The reversal of 421709166 is 661907124.

421709166 is a `hidden beast` number, since 421 + 70 + 9 + 166 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 421709166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1301410 + ... + 1301733.

Almost surely, 2^421709166 is an apocalyptic number.

421709166 is an abundant number, since it is smaller than the sum of its proper divisors (523232106).

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

421709166 is a wasteful number, since it uses less digits than its factorization.

421709166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603157 (or 2603148 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 421709166 is about 20535.5585753103. The cubic root of 421709166 is about 749.9017151207.

It can be divided in two parts, 421709 and 166, that added together give a cube (421875 = 75³).

The spelling of 421709166 in words is "four hundred twenty-one million, seven hundred nine thousand, one hundred sixty-six".