66510532144551 has 32 divisors (see below), whose sum is σ = 99864121006080. Its totient is φ = 39008797257600.

The previous prime is 66510532144501. The next prime is 66510532144559. The reversal of 66510532144551 is 15544123501566.

It is not a de Polignac number, because 66510532144551 - 2¹³ = 66510532136359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66510532144551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66510532144559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212084101 + ... + 212397473.

It is an arithmetic number, because the mean of its divisors is an integer number (3120753781440).

Almost surely, 2^{66510532144551} is an apocalyptic number.

66510532144551 is a deficient number, since it is larger than the sum of its proper divisors (33353588861529).

66510532144551 is a wasteful number, since it uses less digits than its factorization.

66510532144551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520887.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 66510532144551 in words is "sixty-six trillion, five hundred ten billion, five hundred thirty-two million, one hundred forty-four thousand, five hundred fifty-one".