66699202480 has 20 divisors (see below), whose sum is σ = 155075645952. Its totient is φ = 26679680960.

The previous prime is 66699202459. The next prime is 66699202499. The reversal of 66699202480 is 8420299666.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×66699202480² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416869936 + ... + 416870095.

Almost surely, 2^66699202480 is an apocalyptic number.

It is an amenable number.

66699202480 is an abundant number, since it is smaller than the sum of its proper divisors (88376443472).

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

66699202480 is a wasteful number, since it uses less digits than its factorization.

66699202480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833740044 (or 833740038 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 66699202480 in words is "sixty-six billion, six hundred ninety-nine million, two hundred two thousand, four hundred eighty".