7021770725 has 24 divisors (see below), whose sum is σ = 9027372360. Its totient is φ = 5411589120.

The previous prime is 7021770713. The next prime is 7021770731. The reversal of 7021770725 is 5270771207.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2358656356 + 4663114369 = 48566^2 + 68287^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7021770725 is a prime.

It is a super-2 number, since 2×7021770725² = 98610528228934051250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320729 + ... + 341921.

It is an arithmetic number, because the mean of its divisors is an integer number (376140515).

Almost surely, 2^7021770725 is an apocalyptic number.

It is an amenable number.

7021770725 is a deficient number, since it is larger than the sum of its proper divisors (2005601635).

7021770725 is a wasteful number, since it uses less digits than its factorization.

7021770725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21689 (or 21684 counting only the distinct ones).

The product of its (nonzero) digits is 48020, while the sum is 38.

The square root of 7021770725 is about 83796.0066172607. The cubic root of 7021770725 is about 1914.9122684303.

The spelling of 7021770725 in words is "seven billion, twenty-one million, seven hundred seventy thousand, seven hundred twenty-five".