7525706621 has 2 divisors, whose sum is σ = 7525706622. Its totient is φ = 7525706620.

The previous prime is 7525706603. The next prime is 7525706653. The reversal of 7525706621 is 1266075257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5728370596 + 1797336025 = 75686^2 + 42395^2 .

It is an emirp because it is prime and its reverse (1266075257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7525706621 - 2¹⁸ = 7525444477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7525106621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3762853310 + 3762853311.

It is an arithmetic number, because the mean of its divisors is an integer number (3762853311).

Almost surely, 2^7525706621 is an apocalyptic number.

It is an amenable number.

7525706621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7525706621 is an equidigital number, since it uses as much as digits as its factorization.

7525706621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 7525706621 is about 86750.8306646109. The cubic root of 7525706621 is about 1959.6676707304.

The spelling of 7525706621 in words is "seven billion, five hundred twenty-five million, seven hundred six thousand, six hundred twenty-one".