66910601967 has 16 divisors (see below), whose sum is σ = 98777119872. Its totient is φ = 39946626720.

The previous prime is 66910601921. The next prime is 66910601977. The reversal of 66910601967 is 76910601966.

It is not a de Polignac number, because 66910601967 - 2²³ = 66902213359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66910601977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15129088 + ... + 15133509.

It is an arithmetic number, because the mean of its divisors is an integer number (6173569992).

Almost surely, 2^66910601967 is an apocalyptic number.

66910601967 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

66910601967 is a deficient number, since it is larger than the sum of its proper divisors (31866517905).

66910601967 is a wasteful number, since it uses less digits than its factorization.

66910601967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30262678.

The product of its (nonzero) digits is 734832, while the sum is 51.

Subtracting 66910601967 from its reverse (76910601966), we obtain a palindrome (9999999999).

The spelling of 66910601967 in words is "sixty-six billion, nine hundred ten million, six hundred one thousand, nine hundred sixty-seven".