672991015 has 16 divisors (see below), whose sum is σ = 838637856. Its totient is φ = 518054400.

The previous prime is 672991013. The next prime is 672991043. The reversal of 672991015 is 510199276.

It is not a de Polignac number, because 672991015 - 2¹ = 672991013 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 (672991013) 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 15 ways as a sum of consecutive naturals, for example, 7521 + ... + 37450.

It is an arithmetic number, because the mean of its divisors is an integer number (52414866).

Almost surely, 2^672991015 is an apocalyptic number.

672991015 is a deficient number, since it is larger than the sum of its proper divisors (165646841).

672991015 is a wasteful number, since it uses less digits than its factorization.

672991015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45090.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 672991015 is about 25942.0703684189. The cubic root of 672991015 is about 876.3341888296.

The spelling of 672991015 in words is "six hundred seventy-two million, nine hundred ninety-one thousand, fifteen".