620364665 has 8 divisors (see below), whose sum is σ = 770108040. Its totient is φ = 479178112.

The previous prime is 620364637. The next prime is 620364677. The reversal of 620364665 is 566463026.

620364665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 137639824 + 482724841 = 11732^2 + 21971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620364665 - 2¹² = 620360569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2139044 + ... + 2139333.

It is an arithmetic number, because the mean of its divisors is an integer number (96263505).

Almost surely, 2^620364665 is an apocalyptic number.

It is an amenable number.

620364665 is a deficient number, since it is larger than the sum of its proper divisors (149743375).

620364665 is a wasteful number, since it uses less digits than its factorization.

620364665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278411.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 620364665 is about 24907.1207689689. The cubic root of 620364665 is about 852.8690432711.

The spelling of 620364665 in words is "six hundred twenty million, three hundred sixty-four thousand, six hundred sixty-five".