421551066 has 8 divisors (see below), whose sum is σ = 843102144. Its totient is φ = 140517020.

The previous prime is 421551017. The next prime is 421551103. The reversal of 421551066 is 660155124.

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

421551066 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35129250 + ... + 35129261.

It is an arithmetic number, because the mean of its divisors is an integer number (105387768).

Almost surely, 2^421551066 is an apocalyptic number.

421551066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

421551066 is a wasteful number, since it uses less digits than its factorization.

421551066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70258516.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 421551066 is about 20531.7087939606. The cubic root of 421551066 is about 749.8079899582.

The spelling of 421551066 in words is "four hundred twenty-one million, five hundred fifty-one thousand, sixty-six".