69981320666 has 8 divisors (see below), whose sum is σ = 104974614900. Its totient is φ = 34989782368.

The previous prime is 69981320627. The next prime is 69981320671. The reversal of 69981320666 is 66602318996.

It can be written as a sum of positive squares in 2 ways, for example, as 62312640625 + 7668680041 = 249625^2 + 87571^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334361 + ... + 501756.

Almost surely, 2^69981320666 is an apocalyptic number.

69981320666 is a deficient number, since it is larger than the sum of its proper divisors (34993294234).

69981320666 is a wasteful number, since it uses less digits than its factorization.

69981320666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877968.

The product of its (nonzero) digits is 5038848, while the sum is 56.

The spelling of 69981320666 in words is "sixty-nine billion, nine hundred eighty-one million, three hundred twenty thousand, six hundred sixty-six".