61066511 has 4 divisors (see below), whose sum is σ = 66618024. Its totient is φ = 55515000.

The previous prime is 61066501. The next prime is 61066531. The reversal of 61066511 is 11566016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61066511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61066501) 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, 2775740 + ... + 2775761.

It is an arithmetic number, because the mean of its divisors is an integer number (16654506).

Almost surely, 2^61066511 is an apocalyptic number.

61066511 is a deficient number, since it is larger than the sum of its proper divisors (5551513).

61066511 is a wasteful number, since it uses less digits than its factorization.

61066511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551512.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61066511 is about 7814.5064463471. The cubic root of 61066511 is about 393.7927375800.

The spelling of 61066511 in words is "sixty-one million, sixty-six thousand, five hundred eleven".