66201577642 has 8 divisors (see below), whose sum is σ = 100985457600. Its totient is φ = 32539758444.

The previous prime is 66201577619. The next prime is 66201577669. The reversal of 66201577642 is 24677510266.

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

It is a junction number, because it is equal to n+sod(n) for n = 66201577592 and 66201577601.

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, 280515042 + ... + 280515277.

It is an arithmetic number, because the mean of its divisors is an integer number (12623182200).

Almost surely, 2^66201577642 is an apocalyptic number.

66201577642 is a deficient number, since it is larger than the sum of its proper divisors (34783879958).

66201577642 is a wasteful number, since it uses less digits than its factorization.

66201577642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561030380.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 66201577642 in words is "sixty-six billion, two hundred one million, five hundred seventy-seven thousand, six hundred forty-two".