61376661 has 6 divisors (see below), whose sum is σ = 88655190. Its totient is φ = 40917768.

The previous prime is 61376641. The next prime is 61376671. The reversal of 61376661 is 16667316.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 21762225 = 6294^2 + 4665^2 .

It is not a de Polignac number, because 61376661 - 2⁵ = 61376629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61376611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3409806 + ... + 3409823.

It is an arithmetic number, because the mean of its divisors is an integer number (14775865).

Almost surely, 2^61376661 is an apocalyptic number.

It is an amenable number.

61376661 is a deficient number, since it is larger than the sum of its proper divisors (27278529).

61376661 is a wasteful number, since it uses less digits than its factorization.

61376661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819635 (or 6819632 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 61376661 is about 7834.3258165588. The cubic root of 61376661 is about 394.4582885632.

The spelling of 61376661 in words is "sixty-one million, three hundred seventy-six thousand, six hundred sixty-one".