66324532501 has 8 divisors (see below), whose sum is σ = 66403433880. Its totient is φ = 66245664768.

The previous prime is 66324532493. The next prime is 66324532529. The reversal of 66324532501 is 10523542366.

It can be written as a sum of positive squares in 4 ways, for example, as 8038019025 + 58286513476 = 89655^2 + 241426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66324532501 - 2³ = 66324532493 is a prime.

It is a super-2 number, since 2×66324532501² (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 (66324532601) 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, 8352405 + ... + 8360341.

It is an arithmetic number, because the mean of its divisors is an integer number (8300429235).

Almost surely, 2^66324532501 is an apocalyptic number.

It is an amenable number.

66324532501 is a deficient number, since it is larger than the sum of its proper divisors (78901379).

66324532501 is a wasteful number, since it uses less digits than its factorization.

66324532501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16823.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 66324532501 in words is "sixty-six billion, three hundred twenty-four million, five hundred thirty-two thousand, five hundred one".