8421662 has 4 divisors (see below), whose sum is σ = 12632496. Its totient is φ = 4210830.

The previous prime is 8421653. The next prime is 8421697. The reversal of 8421662 is 2661248.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105414 + ... + 2105417.

It is an arithmetic number, because the mean of its divisors is an integer number (3158124).

Almost surely, 2^8421662 is an apocalyptic number.

8421662 is a deficient number, since it is larger than the sum of its proper divisors (4210834).

8421662 is a wasteful number, since it uses less digits than its factorization.

8421662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210833.

The product of its digits is 4608, while the sum is 29.

The square root of 8421662 is about 2902.0099930910. The cubic root of 8421662 is about 203.4538608782.

The spelling of 8421662 in words is "eight million, four hundred twenty-one thousand, six hundred sixty-two".