661531333614 has 32 divisors (see below), whose sum is σ = 1329669955584. Its totient is φ = 219411968160.

The previous prime is 661531333597. The next prime is 661531333627. The reversal of 661531333614 is 416333135166.

It is a happy number.

661531333614 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625567 + ... + 1309349.

It is an arithmetic number, because the mean of its divisors is an integer number (41552186112).

Almost surely, 2^661531333614 is an apocalyptic number.

661531333614 is an abundant number, since it is smaller than the sum of its proper divisors (668138621970).

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

661531333614 is a wasteful number, since it uses less digits than its factorization.

661531333614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684592.

The product of its digits is 349920, while the sum is 42.

The spelling of 661531333614 in words is "six hundred sixty-one billion, five hundred thirty-one million, three hundred thirty-three thousand, six hundred fourteen".