7066672251661 has 16 divisors (see below), whose sum is σ = 7724980584000. Its totient is φ = 6411012641280.

The previous prime is 7066672251641. The next prime is 7066672251721. The reversal of 7066672251661 is 1661522766607.

It is a happy number.

7066672251661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7066672251661 - 2⁴¹ = 4867648996109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7066672251641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172098045 + ... + 172139101.

It is an arithmetic number, because the mean of its divisors is an integer number (482811286500).

Almost surely, 2^{7066672251661} is an apocalyptic number.

It is an amenable number.

7066672251661 is a deficient number, since it is larger than the sum of its proper divisors (658308332339).

7066672251661 is a wasteful number, since it uses less digits than its factorization.

7066672251661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72924.

The product of its (nonzero) digits is 7620480, while the sum is 55.

It can be divided in two parts, 70666 and 72251661, that added together give a palindrome (72322327).

The spelling of 7066672251661 in words is "seven trillion, sixty-six billion, six hundred seventy-two million, two hundred fifty-one thousand, six hundred sixty-one".