61006557 has 16 divisors (see below), whose sum is σ = 89873280. Its totient is φ = 36613632.

The previous prime is 61006529. The next prime is 61006559. The reversal of 61006557 is 75560016.

It is not a de Polignac number, because 61006557 - 2¹⁶ = 60941021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61006559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24832 + ... + 27177.

It is an arithmetic number, because the mean of its divisors is an integer number (5617080).

Almost surely, 2^61006557 is an apocalyptic number.

It is an amenable number.

61006557 is a deficient number, since it is larger than the sum of its proper divisors (28866723).

61006557 is a wasteful number, since it uses less digits than its factorization.

61006557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52052.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 61006557 is about 7810.6694335377. The cubic root of 61006557 is about 393.6638225109.

The spelling of 61006557 in words is "sixty-one million, six thousand, five hundred fifty-seven".