21335632066 has 8 divisors (see below), whose sum is σ = 36575369280. Its totient is φ = 9143842308.

The previous prime is 21335632049. The next prime is 21335632099. The reversal of 21335632066 is 66023653312.

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

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, 761986846 + ... + 761986873.

It is an arithmetic number, because the mean of its divisors is an integer number (4571921160).

Almost surely, 2^21335632066 is an apocalyptic number.

21335632066 is a deficient number, since it is larger than the sum of its proper divisors (15239737214).

21335632066 is a wasteful number, since it uses less digits than its factorization.

21335632066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523973728.

The product of its (nonzero) digits is 116640, while the sum is 37.

The spelling of 21335632066 in words is "twenty-one billion, three hundred thirty-five million, six hundred thirty-two thousand, sixty-six".