66935381732418 has 128 divisors (see below), whose sum is σ = 148088279808000. Its totient is φ = 20074903529472.

The previous prime is 66935381732413. The next prime is 66935381732431. The reversal of 66935381732418 is 81423718353966.

It is a happy 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 63 ways as a sum of consecutive naturals, for example, 1037999205 + ... + 1038063687.

It is an arithmetic number, because the mean of its divisors is an integer number (1156939686000).

Almost surely, 2^{66935381732418} is an apocalyptic number.

66935381732418 is an abundant number, since it is smaller than the sum of its proper divisors (81152898075582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66935381732418 is a wasteful number, since it uses less digits than its factorization.

66935381732418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67336.

The product of its digits is 156764160, while the sum is 66.

The spelling of 66935381732418 in words is "sixty-six trillion, nine hundred thirty-five billion, three hundred eighty-one million, seven hundred thirty-two thousand, four hundred eighteen".