13621646066 has 16 divisors (see below), whose sum is σ = 24725005056. Its totient is φ = 5494445376.

The previous prime is 13621646039. The next prime is 13621646107. The reversal of 13621646066 is 66064612631.

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, 28616666 + ... + 28617141.

It is an arithmetic number, because the mean of its divisors is an integer number (1545312816).

Almost surely, 2^13621646066 is an apocalyptic number.

13621646066 is a deficient number, since it is larger than the sum of its proper divisors (11103358990).

13621646066 is a wasteful number, since it uses less digits than its factorization.

13621646066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57233833.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 13621646066 in words is "thirteen billion, six hundred twenty-one million, six hundred forty-six thousand, sixty-six".