1664654104216 has 16 divisors (see below), whose sum is σ = 3139916426640. Its totient is φ = 827343057120.

The previous prime is 1664654104193. The next prime is 1664654104219. The reversal of 1664654104216 is 6124014564661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664654104219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622997955 + ... + 623000626.

It is an arithmetic number, because the mean of its divisors is an integer number (196244776665).

Almost surely, 2^{1664654104216} is an apocalyptic number.

It is an amenable number.

1664654104216 is a deficient number, since it is larger than the sum of its proper divisors (1475262322424).

1664654104216 is a wasteful number, since it uses less digits than its factorization.

1664654104216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245998754 (or 1245998750 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

Adding to 1664654104216 its reverse (6124014564661), we get a palindrome (7788668668877).

The spelling of 1664654104216 in words is "one trillion, six hundred sixty-four billion, six hundred fifty-four million, one hundred four thousand, two hundred sixteen".