66637016770 has 8 divisors (see below), whose sum is σ = 119946630204. Its totient is φ = 26654806704.

The previous prime is 66637016741. The next prime is 66637016801. The reversal of 66637016770 is 7761073666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65689177401 + 947839369 = 256299^2 + 30787^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66637016770² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 3331850829 + ... + 3331850848.

Almost surely, 2^66637016770 is an apocalyptic number.

66637016770 is a deficient number, since it is larger than the sum of its proper divisors (53309613434).

66637016770 is a wasteful number, since it uses less digits than its factorization.

66637016770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663701684.

The product of its (nonzero) digits is 1333584, while the sum is 49.

The spelling of 66637016770 in words is "sixty-six billion, six hundred thirty-seven million, sixteen thousand, seven hundred seventy".