8420820662 has 16 divisors (see below), whose sum is σ = 12765032352. Its totient is φ = 4165867200.

The previous prime is 8420820637. The next prime is 8420820671. The reversal of 8420820662 is 2660280248.

It is a super-2 number, since 2×8420820662² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298178 + ... + 325194.

It is an arithmetic number, because the mean of its divisors is an integer number (797814522).

Almost surely, 2^8420820662 is an apocalyptic number.

8420820662 is a deficient number, since it is larger than the sum of its proper divisors (4344211690).

8420820662 is a wasteful number, since it uses less digits than its factorization.

8420820662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28663.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 8420820662 is about 91765.0296245798. The cubic root of 8420820662 is about 2034.4708552650.

The spelling of 8420820662 in words is "eight billion, four hundred twenty million, eight hundred twenty thousand, six hundred sixty-two".