2661513373 has 2 divisors, whose sum is σ = 2661513374. Its totient is φ = 2661513372.

The previous prime is 2661513301. The next prime is 2661513409. The reversal of 2661513373 is 3733151662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2284648804 + 376864569 = 47798^2 + 19413^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661513373 - 2²⁵ = 2627958941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661511373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330756686 + 1330756687.

It is an arithmetic number, because the mean of its divisors is an integer number (1330756687).

Almost surely, 2^2661513373 is an apocalyptic number.

It is an amenable number.

2661513373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661513373 is an equidigital number, since it uses as much as digits as its factorization.

2661513373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 2661513373 is about 51589.8572686531. The cubic root of 2661513373 is about 1385.8286991041.

The spelling of 2661513373 in words is "two billion, six hundred sixty-one million, five hundred thirteen thousand, three hundred seventy-three".