672905805 has 144 divisors (see below), whose sum is σ = 1362090240. Its totient is φ = 281698560.

The previous prime is 672905803. The next prime is 672905813. The reversal of 672905805 is 508509276.

672905805 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 672905805 - 2¹ = 672905803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672905803) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8517756 + ... + 8517834.

It is an arithmetic number, because the mean of its divisors is an integer number (9458960).

Almost surely, 2^672905805 is an apocalyptic number.

672905805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

672905805 is an abundant number, since it is smaller than the sum of its proper divisors (689184435).

672905805 is a wasteful number, since it uses less digits than its factorization.

672905805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 672905805 is about 25940.4280034081. The cubic root of 672905805 is about 876.2972019128.

The spelling of 672905805 in words is "six hundred seventy-two million, nine hundred five thousand, eight hundred five".