420662066 has 12 divisors (see below), whose sum is σ = 693571326. Its totient is φ = 191209920.

The previous prime is 420662063. The next prime is 420662069. The reversal of 420662066 is 660266024.

It is an interprime number because it is at equal distance from previous prime (420662063) and next prime (420662069).

It can be written as a sum of positive squares in only one way, i.e., 419061841 + 1600225 = 20471^2 + 1265^2 .

It is not an unprimeable number, because it can be changed into a prime (420662063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 868895 + ... + 869378.

Almost surely, 2^420662066 is an apocalyptic number.

420662066 is a deficient number, since it is larger than the sum of its proper divisors (272909260).

420662066 is a wasteful number, since it uses less digits than its factorization.

420662066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738297 (or 1738286 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 420662066 is about 20510.0479277841. The cubic root of 420662066 is about 749.2805343425.

The spelling of 420662066 in words is "four hundred twenty million, six hundred sixty-two thousand, sixty-six".