421660766 has 8 divisors (see below), whose sum is σ = 633230040. Its totient is φ = 210584088.

The previous prime is 421660763. The next prime is 421660777. The reversal of 421660766 is 667066124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421660763) 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 3 ways as a sum of consecutive naturals, for example, 121001 + ... + 124436.

It is an arithmetic number, because the mean of its divisors is an integer number (79153755).

Almost surely, 2^421660766 is an apocalyptic number.

421660766 is a deficient number, since it is larger than the sum of its proper divisors (211569274).

421660766 is a wasteful number, since it uses less digits than its factorization.

421660766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246298.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 421660766 is about 20534.3800977775. The cubic root of 421660766 is about 749.8730250229.

The spelling of 421660766 in words is "four hundred twenty-one million, six hundred sixty thousand, seven hundred sixty-six".