66951415967 has 6 divisors (see below), whose sum is σ = 69988909872. Its totient is φ = 64040484332.

The previous prime is 66951415961. The next prime is 66951415981. The reversal of 66951415967 is 76951415966.

It is not a de Polignac number, because 66951415967 - 2⁶ = 66951415903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66951415961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63280583 + ... + 63281640.

It is an arithmetic number, because the mean of its divisors is an integer number (11664818312).

Almost surely, 2^66951415967 is an apocalyptic number.

66951415967 is a deficient number, since it is larger than the sum of its proper divisors (3037493905).

66951415967 is a wasteful number, since it uses less digits than its factorization.

66951415967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126562269 (or 126562246 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 59.

Subtracting 66951415967 from its reverse (76951415966), we obtain a palindrome (9999999999).

The spelling of 66951415967 in words is "sixty-six billion, nine hundred fifty-one million, four hundred fifteen thousand, nine hundred sixty-seven".