672730061 has 4 divisors (see below), whose sum is σ = 673142652. Its totient is φ = 672317472.

The previous prime is 672730057. The next prime is 672730073. The reversal of 672730061 is 160037276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 319515625 + 353214436 = 17875^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 672730061 - 2² = 672730057 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 (672738061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203840 + ... + 207113.

It is an arithmetic number, because the mean of its divisors is an integer number (168285663).

Almost surely, 2^672730061 is an apocalyptic number.

It is an amenable number.

672730061 is a deficient number, since it is larger than the sum of its proper divisors (412591).

672730061 is a wasteful number, since it uses less digits than its factorization.

672730061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412590.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 672730061 is about 25937.0403284569. The cubic root of 672730061 is about 876.2209072401.

The spelling of 672730061 in words is "six hundred seventy-two million, seven hundred thirty thousand, sixty-one".