21166032662 has 16 divisors (see below), whose sum is σ = 32281094592. Its totient is φ = 10405792320.

The previous prime is 21166032653. The next prime is 21166032697. The reversal of 21166032662 is 26623066112.

It is a happy number.

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, 327458 + ... + 386730.

It is an arithmetic number, because the mean of its divisors is an integer number (2017568412).

Almost surely, 2^21166032662 is an apocalyptic number.

21166032662 is a deficient number, since it is larger than the sum of its proper divisors (11115061930).

21166032662 is a wasteful number, since it uses less digits than its factorization.

21166032662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62263.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 21166032662 its reverse (26623066112), we get a palindrome (47789098774).

The spelling of 21166032662 in words is "twenty-one billion, one hundred sixty-six million, thirty-two thousand, six hundred sixty-two".