662268078638 has 4 divisors (see below), whose sum is σ = 993402117960. Its totient is φ = 331134039318.

The previous prime is 662268078631. The next prime is 662268078683. The reversal of 662268078638 is 836870862266.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662268078631) by changing a digit.

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 as a sum of consecutive naturals, namely, 165567019658 + ... + 165567019661.

It is an arithmetic number, because the mean of its divisors is an integer number (248350529490).

Almost surely, 2^662268078638 is an apocalyptic number.

662268078638 is a deficient number, since it is larger than the sum of its proper divisors (331134039322).

662268078638 is a wasteful number, since it uses less digits than its factorization.

662268078638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331134039321.

The product of its (nonzero) digits is 55738368, while the sum is 62.

The spelling of 662268078638 in words is "six hundred sixty-two billion, two hundred sixty-eight million, seventy-eight thousand, six hundred thirty-eight".