345870721660 has 48 divisors (see below), whose sum is σ = 744117377472. Its totient is φ = 134960601600.

The previous prime is 345870721631. The next prime is 345870721681. The reversal of 345870721660 is 66127078543.

It is a super-2 number, since 2×345870721660² (a number of 24 digits) contains 22 as substring.

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, 14168065 + ... + 14192455.

It is an arithmetic number, because the mean of its divisors is an integer number (15502445364).

Almost surely, 2^345870721660 is an apocalyptic number.

It is an amenable number.

345870721660 is an abundant number, since it is smaller than the sum of its proper divisors (398246655812).

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

345870721660 is a wasteful number, since it uses less digits than its factorization.

345870721660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41734 (or 41732 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 345870721660 in words is "three hundred forty-five billion, eight hundred seventy million, seven hundred twenty-one thousand, six hundred sixty".