66414301638 has 16 divisors (see below), whose sum is σ = 132861057600. Its totient is φ = 22132691496.

The previous prime is 66414301633. The next prime is 66414301651. The reversal of 66414301638 is 83610341466.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66414301638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66414301633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325620 + ... + 1374807.

It is an arithmetic number, because the mean of its divisors is an integer number (8303816100).

Almost surely, 2^66414301638 is an apocalyptic number.

66414301638 is an abundant number, since it is smaller than the sum of its proper divisors (66446755962).

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

66414301638 is a wasteful number, since it uses less digits than its factorization.

66414301638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704531.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 66414301638 in words is "sixty-six billion, four hundred fourteen million, three hundred one thousand, six hundred thirty-eight".