66067800487 has 4 divisors (see below), whose sum is σ = 71149939000. Its totient is φ = 60985661976.

The previous prime is 66067800467. The next prime is 66067800497. The reversal of 66067800487 is 78400876066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66067800487 - 2³¹ = 63920316839 is a prime.

It is a super-2 number, since 2×66067800487² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66067800437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541069237 + ... + 2541069262.

It is an arithmetic number, because the mean of its divisors is an integer number (17787484750).

Almost surely, 2^66067800487 is an apocalyptic number.

66067800487 is a deficient number, since it is larger than the sum of its proper divisors (5082138513).

66067800487 is a wasteful number, since it uses less digits than its factorization.

66067800487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082138512.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 66067800487 in words is "sixty-six billion, sixty-seven million, eight hundred thousand, four hundred eighty-seven".