63661372461 has 24 divisors (see below), whose sum is σ = 92248097760. Its totient is φ = 42305911200.

The previous prime is 63661372451. The next prime is 63661372471. The reversal of 63661372461 is 16427316636.

63661372461 is a `hidden beast` number, since 6 + 3 + 6 + 613 + 7 + 24 + 6 + 1 = 666.

63661372461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63661372451) and next prime (63661372471).

It is not a de Polignac number, because 63661372461 - 2¹¹ = 63661370413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63661372451) 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, 8220051 + ... + 8227791.

It is an arithmetic number, because the mean of its divisors is an integer number (3843670740).

Almost surely, 2^63661372461 is an apocalyptic number.

It is an amenable number.

63661372461 is a deficient number, since it is larger than the sum of its proper divisors (28586725299).

63661372461 is a wasteful number, since it uses less digits than its factorization.

63661372461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10537 (or 10534 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The spelling of 63661372461 in words is "sixty-three billion, six hundred sixty-one million, three hundred seventy-two thousand, four hundred sixty-one".