66326055507 has 12 divisors (see below), whose sum is σ = 95816582680. Its totient is φ = 44211702528.

The previous prime is 66326055493. The next prime is 66326055533. The reversal of 66326055507 is 70555062366.

66326055507 is a `hidden beast` number, since 6 + 6 + 32 + 60 + 5 + 550 + 7 = 666.

It is not a de Polignac number, because 66326055507 - 2⁴ = 66326055491 is a prime.

It is a super-3 number, since 3×66326055507³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66326055557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397582 + ... + 539187.

Almost surely, 2^66326055507 is an apocalyptic number.

66326055507 is a deficient number, since it is larger than the sum of its proper divisors (29490527173).

66326055507 is a wasteful number, since it uses less digits than its factorization.

66326055507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944642 (or 944639 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 66326055507 in words is "sixty-six billion, three hundred twenty-six million, fifty-five thousand, five hundred seven".