421564066 has 32 divisors (see below), whose sum is σ = 798382080. Its totient is φ = 162162000.

The previous prime is 421564063. The next prime is 421564069. The reversal of 421564066 is 660465124.

It is an interprime number because it is at equal distance from previous prime (421564063) and next prime (421564069).

It is not an unprimeable number, because it can be changed into a prime (421564063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5160 + ... + 29491.

It is an arithmetic number, because the mean of its divisors is an integer number (24949440).

Almost surely, 2^421564066 is an apocalyptic number.

421564066 is a deficient number, since it is larger than the sum of its proper divisors (376818014).

421564066 is a wasteful number, since it uses less digits than its factorization.

421564066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34750.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 421564066 is about 20532.0253750087. The cubic root of 421564066 is about 749.8156975287.

The spelling of 421564066 in words is "four hundred twenty-one million, five hundred sixty-four thousand, sixty-six".