661282200392 has 108 divisors (see below), whose sum is σ = 1389497376435. Its totient is φ = 294821178080.

The previous prime is 661282200379. The next prime is 661282200427. The reversal of 661282200392 is 293002282166.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 330641100196 + 330641100196 = 575014^2 + 575014^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=575014.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1492736123 + ... + 1492736565.

Almost surely, 2^661282200392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661282200392

661282200392 is an abundant number, since it is smaller than the sum of its proper divisors (728215176043).

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

661282200392 is an equidigital number, since it uses as much as digits as its factorization.

661282200392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 661282200392 in words is "six hundred sixty-one billion, two hundred eighty-two million, two hundred thousand, three hundred ninety-two".