61266563 has 4 divisors (see below), whose sum is σ = 61861488. Its totient is φ = 60671640.

The previous prime is 61266551. The next prime is 61266577. The reversal of 61266563 is 36566216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61266563 - 2⁴ = 61266547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61265563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297308 + ... + 297513.

It is an arithmetic number, because the mean of its divisors is an integer number (15465372).

Almost surely, 2^61266563 is an apocalyptic number.

61266563 is a deficient number, since it is larger than the sum of its proper divisors (594925).

61266563 is a wasteful number, since it uses less digits than its factorization.

61266563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594924.

The product of its digits is 38880, while the sum is 35.

The square root of 61266563 is about 7827.2960209768. The cubic root of 61266563 is about 394.2222864647. Note that the first 4 decimals are identical.

The spelling of 61266563 in words is "sixty-one million, two hundred sixty-six thousand, five hundred sixty-three".