421660616 has 32 divisors (see below), whose sum is σ = 896246400. Its totient is φ = 184368960.

The previous prime is 421660607. The next prime is 421660627. The reversal of 421660616 is 616066124.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 104720 + ... + 108671.

It is an arithmetic number, because the mean of its divisors is an integer number (28007700).

Almost surely, 2^421660616 is an apocalyptic number.

It is an amenable number.

421660616 is an abundant number, since it is smaller than the sum of its proper divisors (474585784).

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

421660616 is a wasteful number, since it uses less digits than its factorization.

421660616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213429 (or 213425 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 421660616 is about 20534.3764453660. The cubic root of 421660616 is about 749.8729361039.

The spelling of 421660616 in words is "four hundred twenty-one million, six hundred sixty thousand, six hundred sixteen".