820100670 has 16 divisors (see below), whose sum is σ = 1968241680. Its totient is φ = 218693504.

The previous prime is 820100651. The next prime is 820100681. The reversal of 820100670 is 76001028.

It is a self number, because there is not a number n which added to its sum of digits gives 820100670.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13668315 + ... + 13668374.

It is an arithmetic number, because the mean of its divisors is an integer number (123015105).

Almost surely, 2^820100670 is an apocalyptic number.

820100670 is an abundant number, since it is smaller than the sum of its proper divisors (1148141010).

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

820100670 is a wasteful number, since it uses less digits than its factorization.

820100670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27336699.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 820100670 is about 28637.3998470532. The cubic root of 820100670 is about 936.0284640515.

Adding to 820100670 its reverse (76001028), we get a palindrome (896101698).

The spelling of 820100670 in words is "eight hundred twenty million, one hundred thousand, six hundred seventy".