213650634066 has 64 divisors (see below), whose sum is σ = 450964886400. Its totient is φ = 67292798976.

The previous prime is 213650634049. The next prime is 213650634073. The reversal of 213650634066 is 660436056312.

It is a happy number.

It is a super-3 number, since 3×213650634066³ (a number of 35 digits) contains 333 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, 99232846 + ... + 99234998.

It is an arithmetic number, because the mean of its divisors is an integer number (7046326350).

Almost surely, 2^213650634066 is an apocalyptic number.

213650634066 is an abundant number, since it is smaller than the sum of its proper divisors (237314252334).

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

213650634066 is a wasteful number, since it uses less digits than its factorization.

213650634066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 213650634066 in words is "two hundred thirteen billion, six hundred fifty million, six hundred thirty-four thousand, sixty-six".