420666705 has 48 divisors (see below), whose sum is σ = 742959360. Its totient is φ = 220147200.

The previous prime is 420666703. The next prime is 420666739. The reversal of 420666705 is 507666024.

It is not a de Polignac number, because 420666705 - 2¹ = 420666703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420666705.

It is not an unprimeable number, because it can be changed into a prime (420666703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 856510 + ... + 857000.

It is an arithmetic number, because the mean of its divisors is an integer number (15478320).

Almost surely, 2^420666705 is an apocalyptic number.

420666705 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420666705 is a deficient number, since it is larger than the sum of its proper divisors (322292655).

420666705 is a wasteful number, since it uses less digits than its factorization.

420666705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 420666705 is about 20510.1610183831. The cubic root of 420666705 is about 749.2832886513.

The spelling of 420666705 in words is "four hundred twenty million, six hundred sixty-six thousand, seven hundred five".