66934491 has 16 divisors (see below), whose sum is σ = 101765664. Its totient is φ = 38767104.

The previous prime is 66934453. The next prime is 66934513. The reversal of 66934491 is 19443966.

It is not a de Polignac number, because 66934491 - 2¹⁴ = 66918107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66934411) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 49816 + ... + 51141.

It is an arithmetic number, because the mean of its divisors is an integer number (6360354).

Almost surely, 2^66934491 is an apocalyptic number.

66934491 is a deficient number, since it is larger than the sum of its proper divisors (34831173).

66934491 is a wasteful number, since it uses less digits than its factorization.

66934491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100990.

The product of its digits is 139968, while the sum is 42.

The square root of 66934491 is about 8181.3501941917. The cubic root of 66934491 is about 406.0223947623.

The spelling of 66934491 in words is "sixty-six million, nine hundred thirty-four thousand, four hundred ninety-one".