7021177668 has 36 divisors (see below), whose sum is σ = 17991106588. Its totient is φ = 2308331520.

The previous prime is 7021177661. The next prime is 7021177721. The reversal of 7021177668 is 8667711207.

It can be written as a sum of positive squares in 2 ways, for example, as 1461685824 + 5559491844 = 38232^2 + 74562^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (7021177661) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1333213 + ... + 1338468.

Almost surely, 2^7021177668 is an apocalyptic number.

It is an amenable number.

7021177668 is an abundant number, since it is smaller than the sum of its proper divisors (10969928920).

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

7021177668 is a wasteful number, since it uses less digits than its factorization.

7021177668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671764 (or 2671759 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 7021177668 is about 83792.4678476532. The cubic root of 7021177668 is about 1914.8583559086.

The spelling of 7021177668 in words is "seven billion, twenty-one million, one hundred seventy-seven thousand, six hundred sixty-eight".