66509903462 has 8 divisors (see below), whose sum is σ = 99766049376. Its totient is φ = 33254553672.

The previous prime is 66509903417. The next prime is 66509903501. The reversal of 66509903462 is 26430990566.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66509903462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99203 + ... + 377969.

It is an arithmetic number, because the mean of its divisors is an integer number (12470756172).

Almost surely, 2^66509903462 is an apocalyptic number.

66509903462 is a deficient number, since it is larger than the sum of its proper divisors (33256145914).

66509903462 is a wasteful number, since it uses less digits than its factorization.

66509903462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398062.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 66509903462 in words is "sixty-six billion, five hundred nine million, nine hundred three thousand, four hundred sixty-two".