2251153026066 has 64 divisors (see below), whose sum is σ = 5468893747200. Its totient is φ = 603418761216.

The previous prime is 2251153025993. The next prime is 2251153026107. The reversal of 2251153026066 is 6606203511522.

It is a super-2 number, since 2×2251153026066² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13611951 + ... + 13776338.

It is an arithmetic number, because the mean of its divisors is an integer number (85451464800).

Almost surely, 2^{2251153026066} is an apocalyptic number.

2251153026066 is an abundant number, since it is smaller than the sum of its proper divisors (3217740721134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251153026066 is a wasteful number, since it uses less digits than its factorization.

2251153026066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27388423.

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 2251153026066 its reverse (6606203511522), we get a palindrome (8857356537588).

The spelling of 2251153026066 in words is "two trillion, two hundred fifty-one billion, one hundred fifty-three million, twenty-six thousand, sixty-six".