66019638290 has 32 divisors (see below), whose sum is σ = 119745085104. Its totient is φ = 26205829120.

The previous prime is 66019638287. The next prime is 66019638301. The reversal of 66019638290 is 9283691066.

It can be written as a sum of positive squares in 8 ways, for example, as 63322186321 + 2697451969 = 251639^2 + 51937^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4899242 + ... + 4912698.

Almost surely, 2^66019638290 is an apocalyptic number.

66019638290 is a deficient number, since it is larger than the sum of its proper divisors (53725446814).

66019638290 is a wasteful number, since it uses less digits than its factorization.

66019638290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17182.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 66019638290 in words is "sixty-six billion, nineteen million, six hundred thirty-eight thousand, two hundred ninety".