661124363 has 4 divisors (see below), whose sum is σ = 661207248. Its totient is φ = 661041480.

The previous prime is 661124353. The next prime is 661124371. The reversal of 661124363 is 363421166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 363421166 = 2 ⋅181710583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661124363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661124353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28031 + ... + 45912.

It is an arithmetic number, because the mean of its divisors is an integer number (165301812).

Almost surely, 2^661124363 is an apocalyptic number.

661124363 is a deficient number, since it is larger than the sum of its proper divisors (82885).

661124363 is an equidigital number, since it uses as much as digits as its factorization.

661124363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82884.

The product of its digits is 15552, while the sum is 32.

The square root of 661124363 is about 25712.3387306561. The cubic root of 661124363 is about 871.1529010023.

The spelling of 661124363 in words is "six hundred sixty-one million, one hundred twenty-four thousand, three hundred sixty-three".