662641555 has 16 divisors (see below), whose sum is σ = 844971264. Its totient is φ = 497136640.

The previous prime is 662641541. The next prime is 662641559. The reversal of 662641555 is 555146266.

It is not a de Polignac number, because 662641555 - 2⁹ = 662641043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (662641559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10014 + ... + 37756.

It is an arithmetic number, because the mean of its divisors is an integer number (52810704).

Almost surely, 2^662641555 is an apocalyptic number.

662641555 is a deficient number, since it is larger than the sum of its proper divisors (182329709).

662641555 is a wasteful number, since it uses less digits than its factorization.

662641555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28046.

The product of its digits is 216000, while the sum is 40.

The square root of 662641555 is about 25741.8250130017. The cubic root of 662641555 is about 871.8187850259.

The spelling of 662641555 in words is "six hundred sixty-two million, six hundred forty-one thousand, five hundred fifty-five".