7521714761661 has 24 divisors (see below), whose sum is σ = 11168977255800. Its totient is φ = 4874298840576.

The previous prime is 7521714761657. The next prime is 7521714761669. The reversal of 7521714761661 is 1661674171257.

7521714761661 is a `hidden beast` number, since 7 + 5 + 2 + 1 + 7 + 1 + 476 + 166 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2924202600900 + 4597512160761 = 1710030^2 + 2144181^2 .

It is not a de Polignac number, because 7521714761661 - 2² = 7521714761657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7521714761598 and 7521714761607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7521714761669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10417000 + ... + 11115633.

It is an arithmetic number, because the mean of its divisors is an integer number (465374052325).

Almost surely, 2^{7521714761661} is an apocalyptic number.

It is an amenable number.

7521714761661 is a deficient number, since it is larger than the sum of its proper divisors (3647262494139).

7521714761661 is a wasteful number, since it uses less digits than its factorization.

7521714761661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21533725 (or 21533722 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The spelling of 7521714761661 in words is "seven trillion, five hundred twenty-one billion, seven hundred fourteen million, seven hundred sixty-one thousand, six hundred sixty-one".