7065499621 has 4 divisors (see below), whose sum is σ = 7074833932. Its totient is φ = 7056165312.

The previous prime is 7065499603. The next prime is 7065499631. The reversal of 7065499621 is 1269945607.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3954648996 + 3110850625 = 62886^2 + 55775^2 .

It is a cyclic number.

It is not a de Polignac number, because 7065499621 - 2¹¹ = 7065497573 is a prime.

It is a super-2 number, since 2×7065499621² = 99842569788702287282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7065499601) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4666020 + ... + 4667533.

It is an arithmetic number, because the mean of its divisors is an integer number (1768708483).

Almost surely, 2^7065499621 is an apocalyptic number.

It is an amenable number.

7065499621 is a deficient number, since it is larger than the sum of its proper divisors (9334311).

7065499621 is an equidigital number, since it uses as much as digits as its factorization.

7065499621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9334310.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 7065499621 is about 84056.5263438836. The cubic root of 7065499621 is about 1918.8791581849.

The spelling of 7065499621 in words is "seven billion, sixty-five million, four hundred ninety-nine thousand, six hundred twenty-one".