662220026 has 16 divisors (see below), whose sum is σ = 1087279368. Its totient is φ = 300628800.

The previous prime is 662220007. The next prime is 662220049. The reversal of 662220026 is 620022266.

It can be written as a sum of positive squares in 4 ways, for example, as 498405625 + 163814401 = 22325^2 + 12799^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 662219977 and 662220004.

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, 207185 + ... + 210356.

Almost surely, 2^662220026 is an apocalyptic number.

662220026 is a deficient number, since it is larger than the sum of its proper divisors (425059342).

662220026 is a wasteful number, since it uses less digits than its factorization.

662220026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417617.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 662220026 is about 25733.6360819842. The cubic root of 662220026 is about 871.6338812112.

The spelling of 662220026 in words is "six hundred sixty-two million, two hundred twenty thousand, twenty-six".