345623665 has 16 divisors (see below), whose sum is σ = 424816128. Its totient is φ = 269822016.

The previous prime is 345623647. The next prime is 345623713. The reversal of 345623665 is 566326543.

It is a cyclic number.

It is not a de Polignac number, because 345623665 - 2⁵ = 345623633 is a prime.

It is a Duffinian 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, 85684 + ... + 89626.

It is an arithmetic number, because the mean of its divisors is an integer number (26551008).

Almost surely, 2^345623665 is an apocalyptic number.

It is an amenable number.

345623665 is a deficient number, since it is larger than the sum of its proper divisors (79192463).

345623665 is a wasteful number, since it uses less digits than its factorization.

345623665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368.

The product of its digits is 388800, while the sum is 40.

The square root of 345623665 is about 18590.9565380590. The cubic root of 345623665 is about 701.7802746017.

The spelling of 345623665 in words is "three hundred forty-five million, six hundred twenty-three thousand, six hundred sixty-five".