672072566661 has 48 divisors (see below), whose sum is σ = 1032567419520. Its totient is φ = 436574810880.

The previous prime is 672072566653. The next prime is 672072566839. The reversal of 672072566661 is 166665270276.

672072566661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 672072566661 - 2³ = 672072566653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672072566598 and 672072566607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672072566611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8018376 + ... + 8101758.

It is an arithmetic number, because the mean of its divisors is an integer number (21511821240).

Almost surely, 2^672072566661 is an apocalyptic number.

It is an amenable number.

672072566661 is a deficient number, since it is larger than the sum of its proper divisors (360494852859).

672072566661 is an equidigital number, since it uses as much as digits as its factorization.

672072566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84248 (or 84236 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 672072566661 in words is "six hundred seventy-two billion, seventy-two million, five hundred sixty-six thousand, six hundred sixty-one".