66420352497 has 8 divisors (see below), whose sum is σ = 88740839520. Its totient is φ = 44190050240.

The previous prime is 66420352463. The next prime is 66420352541. The reversal of 66420352497 is 79425302466.

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 66420352497 - 2²⁷ = 66286134769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66420352447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22544472 + ... + 22547417.

It is an arithmetic number, because the mean of its divisors is an integer number (11092604940).

Almost surely, 2^66420352497 is an apocalyptic number.

It is an amenable number.

66420352497 is a deficient number, since it is larger than the sum of its proper divisors (22320487023).

66420352497 is a wasteful number, since it uses less digits than its factorization.

66420352497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45092383.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 66420352497 in words is "sixty-six billion, four hundred twenty million, three hundred fifty-two thousand, four hundred ninety-seven".