661103424 has 56 divisors (see below), whose sum is σ = 1943526720. Its totient is φ = 220367232.

The previous prime is 661103419. The next prime is 661103431. The reversal of 661103424 is 424301166.

661103424 is a `hidden beast` number, since 6 + 611 + 0 + 3 + 42 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 189564 + ... + 193019.

Almost surely, 2^661103424 is an apocalyptic number.

661103424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

661103424 is an abundant number, since it is smaller than the sum of its proper divisors (1282423296).

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

661103424 is a wasteful number, since it uses less digits than its factorization.

661103424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382604 (or 382588 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 661103424 is about 25711.9315493799. The cubic root of 661103424 is about 871.1437039111.

The spelling of 661103424 in words is "six hundred sixty-one million, one hundred three thousand, four hundred twenty-four".