661243466352 has 80 divisors (see below), whose sum is σ = 1953556964352. Its totient is φ = 188799509760.

The previous prime is 661243466329. The next prime is 661243466353. The reversal of 661243466352 is 253664342166.

661243466352 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661243466353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162099 + ... + 1161362.

Almost surely, 2^661243466352 is an apocalyptic number.

It is an amenable number.

661243466352 is an abundant number, since it is smaller than the sum of its proper divisors (1292313498000).

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

661243466352 is a wasteful number, since it uses less digits than its factorization.

661243466352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324966 (or 1324960 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 48.

The spelling of 661243466352 in words is "six hundred sixty-one billion, two hundred forty-three million, four hundred sixty-six thousand, three hundred fifty-two".