61111668 has 24 divisors (see below), whose sum is σ = 150982272. Its totient is φ = 19172224.

The previous prime is 61111637. The next prime is 61111681. The reversal of 61111668 is 86611116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149580 + ... + 149987.

It is an arithmetic number, because the mean of its divisors is an integer number (6290928).

Almost surely, 2^61111668 is an apocalyptic number.

61111668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61111668 is an abundant number, since it is smaller than the sum of its proper divisors (89870604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61111668 is a wasteful number, since it uses less digits than its factorization.

61111668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299591 (or 299589 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 61111668 is about 7817.3952183576. The cubic root of 61111668 is about 393.8897799519.

The spelling of 61111668 in words is "sixty-one million, one hundred eleven thousand, six hundred sixty-eight".