672060123521 has 4 divisors (see below), whose sum is σ = 675073846272. Its totient is φ = 669046400772.

The previous prime is 672060123467. The next prime is 672060123523. The reversal of 672060123521 is 125321060276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672060123521 - 2²² = 672055929217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672060123523) 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, 1506861041 + ... + 1506861486.

It is an arithmetic number, because the mean of its divisors is an integer number (168768461568).

Almost surely, 2^672060123521 is an apocalyptic number.

It is an amenable number.

672060123521 is a deficient number, since it is larger than the sum of its proper divisors (3013722751).

672060123521 is a wasteful number, since it uses less digits than its factorization.

672060123521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013722750.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 672060123521 its reverse (125321060276), we get a palindrome (797381183797).

The spelling of 672060123521 in words is "six hundred seventy-two billion, sixty million, one hundred twenty-three thousand, five hundred twenty-one".