620066665 has 16 divisors (see below), whose sum is σ = 768398400. Its totient is φ = 480053952.

The previous prime is 620066651. The next prime is 620066677. The reversal of 620066665 is 566660026.

It is a cyclic number.

It is not a de Polignac number, because 620066665 - 2²⁹ = 83195753 is a prime.

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, 10206 + ... + 36664.

It is an arithmetic number, because the mean of its divisors is an integer number (48024900).

Almost surely, 2^620066665 is an apocalyptic number.

It is an amenable number.

620066665 is a deficient number, since it is larger than the sum of its proper divisors (148331735).

620066665 is a wasteful number, since it uses less digits than its factorization.

620066665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26616.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 620066665 is about 24901.1378254087. The cubic root of 620066665 is about 852.7324592608.

The spelling of 620066665 in words is "six hundred twenty million, sixty-six thousand, six hundred sixty-five".