61099661 has 8 divisors (see below), whose sum is σ = 72864384. Its totient is φ = 50094000.

The previous prime is 61099601. The next prime is 61099663. The reversal of 61099661 is 16699016.

61099661 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 not a de Polignac number, because 61099661 - 2¹⁴ = 61083277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61099663) 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, 189590 + ... + 189911.

It is an arithmetic number, because the mean of its divisors is an integer number (9108048).

Almost surely, 2^61099661 is an apocalyptic number.

It is an amenable number.

61099661 is a deficient number, since it is larger than the sum of its proper divisors (11764723).

61099661 is a wasteful number, since it uses less digits than its factorization.

61099661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379531.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 61099661 is about 7816.6272138308. The cubic root of 61099661 is about 393.8639815814.

The spelling of 61099661 in words is "sixty-one million, ninety-nine thousand, six hundred sixty-one".