66670531516 has 12 divisors (see below), whose sum is σ = 116690883232. Its totient is φ = 33330279168.

The previous prime is 66670531489. The next prime is 66670531523. The reversal of 66670531516 is 61513507666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216485 + ... + 1270108.

Almost surely, 2^66670531516 is an apocalyptic number.

It is an amenable number.

66670531516 is a deficient number, since it is larger than the sum of its proper divisors (50020351716).

66670531516 is a wasteful number, since it uses less digits than its factorization.

66670531516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493300 (or 2493298 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 66670531516 in words is "sixty-six billion, six hundred seventy million, five hundred thirty-one thousand, five hundred sixteen".