66350987479 has 8 divisors (see below), whose sum is σ = 76226715648. Its totient is φ = 56574513240.

The previous prime is 66350987441. The next prime is 66350987491. The reversal of 66350987479 is 97478905366.

It is a happy number.

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

It is not a de Polignac number, because 66350987479 - 2⁹ = 66350986967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66350987479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66350987429) 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, 24812047 + ... + 24814720.

It is an arithmetic number, because the mean of its divisors is an integer number (9528339456).

Almost surely, 2^66350987479 is an apocalyptic number.

66350987479 is a deficient number, since it is larger than the sum of its proper divisors (9875728169).

66350987479 is a wasteful number, since it uses less digits than its factorization.

66350987479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49626965.

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 66350987479 in words is "sixty-six billion, three hundred fifty million, nine hundred eighty-seven thousand, four hundred seventy-nine".