2501276661 has 24 divisors (see below), whose sum is σ = 3897293400. Its totient is φ = 1536708096.

The previous prime is 2501276639. The next prime is 2501276681. The reversal of 2501276661 is 1666721052.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 196700625 + 2304576036 = 14025^2 + 48006^2 .

It is not a de Polignac number, because 2501276661 - 2¹⁴ = 2501260277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501276681) 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, 54865 + ... + 89513.

It is an arithmetic number, because the mean of its divisors is an integer number (162387225).

Almost surely, 2^2501276661 is an apocalyptic number.

It is an amenable number.

2501276661 is a deficient number, since it is larger than the sum of its proper divisors (1396016739).

2501276661 is a wasteful number, since it uses less digits than its factorization.

2501276661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35285 (or 35282 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 2501276661 is about 50012.7649805527. The cubic root of 2501276661 is about 1357.4397950569.

The spelling of 2501276661 in words is "two billion, five hundred one million, two hundred seventy-six thousand, six hundred sixty-one".