69887802666 has 48 divisors (see below), whose sum is σ = 154442340864. Its totient is φ = 21067200000.

The previous prime is 69887802637. The next prime is 69887802701. The reversal of 69887802666 is 66620878896.

It is a super-2 number, since 2×69887802666² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 69887802597 and 69887802606.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113335 + ... + 390666.

It is an arithmetic number, because the mean of its divisors is an integer number (3217548768).

Almost surely, 2^69887802666 is an apocalyptic number.

69887802666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

69887802666 is an abundant number, since it is smaller than the sum of its proper divisors (84554538198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69887802666 is a wasteful number, since it uses less digits than its factorization.

69887802666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504219 (or 504208 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 69887802666 in words is "sixty-nine billion, eight hundred eighty-seven million, eight hundred two thousand, six hundred sixty-six".