61534566 has 40 divisors (see below), whose sum is σ = 142342464. Its totient is φ = 19848240.

The previous prime is 61534541. The next prime is 61534573. The reversal of 61534566 is 66543516.

61534566 is a `hidden beast` number, since 61 + 5 + 34 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61534566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1105 + ... + 11148.

Almost surely, 2^61534566 is an apocalyptic number.

61534566 is an abundant number, since it is smaller than the sum of its proper divisors (80807898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61534566 is a wasteful number, since it uses less digits than its factorization.

61534566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12298 (or 12289 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 61534566 is about 7844.3971087650. The cubic root of 61534566 is about 394.7962758677.

The spelling of 61534566 in words is "sixty-one million, five hundred thirty-four thousand, five hundred sixty-six".