61611663 has 8 divisors (see below), whose sum is σ = 84798976. Its totient is φ = 39749400.

The previous prime is 61611653. The next prime is 61611677. The reversal of 61611663 is 36611616.

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

It is not a de Polignac number, because 61611663 - 2¹⁰ = 61610639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61611663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61611653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331153 + ... + 331338.

It is an arithmetic number, because the mean of its divisors is an integer number (10599872).

Almost surely, 2^61611663 is an apocalyptic number.

61611663 is a deficient number, since it is larger than the sum of its proper divisors (23187313).

61611663 is a wasteful number, since it uses less digits than its factorization.

61611663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662525.

The product of its digits is 3888, while the sum is 30.

The square root of 61611663 is about 7849.3097148730. The cubic root of 61611663 is about 394.9610878722.

The spelling of 61611663 in words is "sixty-one million, six hundred eleven thousand, six hundred sixty-three".