662144722978 has 16 divisors (see below), whose sum is σ = 1051267875840. Its totient is φ = 311914638000.

The previous prime is 662144722963. The next prime is 662144723063. The reversal of 662144722978 is 879227441266.

It is a super-2 number, since 2×662144722978² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48128098 + ... + 48141853.

It is an arithmetic number, because the mean of its divisors is an integer number (65704242240).

Almost surely, 2^662144722978 is an apocalyptic number.

662144722978 is a deficient number, since it is larger than the sum of its proper divisors (389123152862).

662144722978 is a wasteful number, since it uses less digits than its factorization.

662144722978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96270153.

The product of its digits is 16257024, while the sum is 58.

The spelling of 662144722978 in words is "six hundred sixty-two billion, one hundred forty-four million, seven hundred twenty-two thousand, nine hundred seventy-eight".