662071748978 has 16 divisors (see below), whose sum is σ = 996789288600. Its totient is φ = 329810246016.

The previous prime is 662071748977. The next prime is 662071749007. The reversal of 662071748978 is 879847170266.

It can be written as a sum of positive squares in 4 ways, for example, as 475778514289 + 186293234689 = 689767^2 + 431617^2 .

It is not an unprimeable number, because it can be changed into a prime (662071748971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435176 + ... + 1230252.

Almost surely, 2^662071748978 is an apocalyptic number.

662071748978 is a deficient number, since it is larger than the sum of its proper divisors (334717539622).

662071748978 is a wasteful number, since it uses less digits than its factorization.

662071748978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796621.

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 662071748978 in words is "six hundred sixty-two billion, seventy-one million, seven hundred forty-eight thousand, nine hundred seventy-eight".