661148112 has 40 divisors (see below), whose sum is σ = 1717424800. Its totient is φ = 219162240.

The previous prime is 661148101. The next prime is 661148113. The reversal of 661148112 is 211841166.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 661148112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661148113) 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, 29362 + ... + 46737.

It is an arithmetic number, because the mean of its divisors is an integer number (42935620).

Almost surely, 2^661148112 is an apocalyptic number.

It is an amenable number.

661148112 is an abundant number, since it is smaller than the sum of its proper divisors (1056276688).

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

661148112 is a wasteful number, since it uses less digits than its factorization.

661148112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76291 (or 76285 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 661148112 is about 25712.8005475872. The cubic root of 661148112 is about 871.1633321020.

Adding to 661148112 its reverse (211841166), we get a palindrome (872989278).

The spelling of 661148112 in words is "six hundred sixty-one million, one hundred forty-eight thousand, one hundred twelve".