661005757048 has 32 divisors (see below), whose sum is σ = 1525397902560. Its totient is φ = 261496782720.

The previous prime is 661005757037. The next prime is 661005757051. The reversal of 661005757048 is 840757500166.

It is a happy number.

661005757048 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×661005757048² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661005756992 and 661005757010.

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, 453986743 + ... + 453988198.

It is an arithmetic number, because the mean of its divisors is an integer number (47668684455).

Almost surely, 2^661005757048 is an apocalyptic number.

It is an amenable number.

661005757048 is an abundant number, since it is smaller than the sum of its proper divisors (864392145512).

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

661005757048 is a wasteful number, since it uses less digits than its factorization.

661005757048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907974967 (or 907974963 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 661005757048 in words is "six hundred sixty-one billion, five million, seven hundred fifty-seven thousand, forty-eight".