661030054050 has 48 divisors (see below), whose sum is σ = 1639422248832. Its totient is φ = 176267400000.

The previous prime is 661030053989. The next prime is 661030054051. The reversal of 661030054050 is 50450030166.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 661030053999 and 661030054017.

It is not an unprimeable number, because it can be changed into a prime (661030054051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4236012 + ... + 4389288.

It is an arithmetic number, because the mean of its divisors is an integer number (34154630184).

Almost surely, 2^661030054050 is an apocalyptic number.

661030054050 is an abundant number, since it is smaller than the sum of its proper divisors (978392194782).

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

661030054050 is a wasteful number, since it uses less digits than its factorization.

661030054050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182043 (or 182038 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 661030054050 in words is "six hundred sixty-one billion, thirty million, fifty-four thousand, fifty".