420365665 has 8 divisors (see below), whose sum is σ = 505846080. Its totient is φ = 335354352.

The previous prime is 420365629. The next prime is 420365683. The reversal of 420365665 is 566563024.

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 420365665 - 2¹⁹ = 419841377 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, 115299 + ... + 118888.

It is an arithmetic number, because the mean of its divisors is an integer number (63230760).

Almost surely, 2^420365665 is an apocalyptic number.

It is an amenable number.

420365665 is a deficient number, since it is larger than the sum of its proper divisors (85480415).

420365665 is a wasteful number, since it uses less digits than its factorization.

420365665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234551.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 420365665 is about 20502.8209034757. The cubic root of 420365665 is about 749.1045104828.

The spelling of 420365665 in words is "four hundred twenty million, three hundred sixty-five thousand, six hundred sixty-five".