345690660 has 192 divisors, whose sum is σ = 1143926784. Its totient is φ = 76377600.

The previous prime is 345690647. The next prime is 345690671. The reversal of 345690660 is 66096543.

It is a happy number.

It is a super-2 number, since 2×345690660² = 239004064822471200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2638795 + ... + 2638925.

It is an arithmetic number, because the mean of its divisors is an integer number (5957952).

Almost surely, 2^345690660 is an apocalyptic number.

345690660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345690660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571963392).

345690660 is an abundant number, since it is smaller than the sum of its proper divisors (798236124).

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

345690660 is a wasteful number, since it uses less digits than its factorization.

345690660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 345690660 is about 18592.7582676697. The cubic root of 345690660 is about 701.8256155672.

The spelling of 345690660 in words is "three hundred forty-five million, six hundred ninety thousand, six hundred sixty".