661552422 has 8 divisors (see below), whose sum is σ = 1323104856. Its totient is φ = 220517472.

The previous prime is 661552421. The next prime is 661552447. The reversal of 661552422 is 224255166.

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

661552422 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661552421) 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, 55129363 + ... + 55129374.

It is an arithmetic number, because the mean of its divisors is an integer number (165388107).

Almost surely, 2^661552422 is an apocalyptic number.

661552422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661552422 is a wasteful number, since it uses less digits than its factorization.

661552422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110258742.

The product of its digits is 28800, while the sum is 33.

The square root of 661552422 is about 25720.6613834093. The cubic root of 661552422 is about 871.3408759168.

The spelling of 661552422 in words is "six hundred sixty-one million, five hundred fifty-two thousand, four hundred twenty-two".