66935381732417 has 16 divisors (see below), whose sum is σ = 73341710868480. Its totient is φ = 60582619267200.

The previous prime is 66935381732413. The next prime is 66935381732431. The reversal of 66935381732417 is 71423718353966.

It is a cyclic number.

It is not a de Polignac number, because 66935381732417 - 2² = 66935381732413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66935381732413) 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, 78473408 + ... + 79321790.

It is an arithmetic number, because the mean of its divisors is an integer number (4583856929280).

Almost surely, 2^{66935381732417} is an apocalyptic number.

It is an amenable number.

66935381732417 is a deficient number, since it is larger than the sum of its proper divisors (6406329136063).

66935381732417 is a wasteful number, since it uses less digits than its factorization.

66935381732417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879944.

The product of its digits is 137168640, while the sum is 65.

The spelling of 66935381732417 in words is "sixty-six trillion, nine hundred thirty-five billion, three hundred eighty-one million, seven hundred thirty-two thousand, four hundred seventeen".