61100661 has 8 divisors (see below), whose sum is σ = 81509760. Its totient is φ = 40712672.

The previous prime is 61100629. The next prime is 61100687. The reversal of 61100661 is 16600116.

61100661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61100661 - 2⁵ = 61100629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61100461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3625 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (10188720).

Almost surely, 2^61100661 is an apocalyptic number.

It is an amenable number.

61100661 is a deficient number, since it is larger than the sum of its proper divisors (20409099).

61100661 is a wasteful number, since it uses less digits than its factorization.

61100661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 61100661 is about 7816.6911797768. The cubic root of 61100661 is about 393.8661303213.

Adding to 61100661 its reverse (16600116), we get a palindrome (77700777).

The spelling of 61100661 in words is "sixty-one million, one hundred thousand, six hundred sixty-one".