16662045451601 has 16 divisors (see below), whose sum is σ = 18599734728960. Its totient is φ = 14794858325520.

The previous prime is 16662045451589. The next prime is 16662045451613. The reversal of 16662045451601 is 10615454026661.

It is an interprime number because it is at equal distance from previous prime (16662045451589) and next prime (16662045451613).

It is a cyclic number.

It is not a de Polignac number, because 16662045451601 - 2²² = 16662041257297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16662045451621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45974366 + ... + 46335368.

It is an arithmetic number, because the mean of its divisors is an integer number (1162483420560).

Almost surely, 2^{16662045451601} is an apocalyptic number.

16662045451601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16662045451601 is a deficient number, since it is larger than the sum of its proper divisors (1937689277359).

16662045451601 is a wasteful number, since it uses less digits than its factorization.

16662045451601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458636.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 16662045451601 in words is "sixteen trillion, six hundred sixty-two billion, forty-five million, four hundred fifty-one thousand, six hundred one".