201020066615 has 8 divisors (see below), whose sum is σ = 249542151840. Its totient is φ = 155270672032.

The previous prime is 201020066591. The next prime is 201020066629. The reversal of 201020066615 is 516660020102.

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 201020066615 - 2¹² = 201020062519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693172499 + ... + 693172788.

It is an arithmetic number, because the mean of its divisors is an integer number (31192768980).

Almost surely, 2^201020066615 is an apocalyptic number.

201020066615 is a deficient number, since it is larger than the sum of its proper divisors (48522085225).

201020066615 is a wasteful number, since it uses less digits than its factorization.

201020066615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386345321.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 201020066615 its reverse (516660020102), we get a palindrome (717680086717).

The spelling of 201020066615 in words is "two hundred one billion, twenty million, sixty-six thousand, six hundred fifteen".