10202066655 has 16 divisors (see below), whose sum is σ = 17807243904. Its totient is φ = 4946456480.

The previous prime is 10202066621. The next prime is 10202066659. The reversal of 10202066655 is 55666020201.

It is a happy number.

It is not a de Polignac number, because 10202066655 - 2²¹ = 10199969503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202066659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30915189 + ... + 30915518.

It is an arithmetic number, because the mean of its divisors is an integer number (1112952744).

Almost surely, 2^10202066655 is an apocalyptic number.

10202066655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10202066655 is a deficient number, since it is larger than the sum of its proper divisors (7605177249).

10202066655 is a wasteful number, since it uses less digits than its factorization.

10202066655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61830726.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 10202066655 its reverse (55666020201), we get a palindrome (65868086856).

The spelling of 10202066655 in words is "ten billion, two hundred two million, sixty-six thousand, six hundred fifty-five".