67665433985 has 16 divisors (see below), whose sum is σ = 84058060800. Its totient is φ = 52235997120.

The previous prime is 67665433967. The next prime is 67665433991. The reversal of 67665433985 is 58933456676.

It is a happy number.

It is not a de Polignac number, because 67665433985 - 2⁸ = 67665433729 is a prime.

It is a super-2 number, since 2×67665433985² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571337 + ... + 679526.

It is an arithmetic number, because the mean of its divisors is an integer number (5253628800).

Almost surely, 2^67665433985 is an apocalyptic number.

It is an amenable number.

67665433985 is a deficient number, since it is larger than the sum of its proper divisors (16392626815).

67665433985 is a wasteful number, since it uses less digits than its factorization.

67665433985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251248.

The product of its digits is 97977600, while the sum is 62.

The spelling of 67665433985 in words is "sixty-seven billion, six hundred sixty-five million, four hundred thirty-three thousand, nine hundred eighty-five".