672623761 has 4 divisors (see below), whose sum is σ = 672772672. Its totient is φ = 672474852.

The previous prime is 672623723. The next prime is 672623779. The reversal of 672623761 is 167326276.

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 672623761 - 2¹⁹ = 672099473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672623711) 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, 67461 + ... + 76786.

It is an arithmetic number, because the mean of its divisors is an integer number (168193168).

Almost surely, 2^672623761 is an apocalyptic number.

It is an amenable number.

672623761 is a deficient number, since it is larger than the sum of its proper divisors (148911).

672623761 is a wasteful number, since it uses less digits than its factorization.

672623761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148910.

The product of its digits is 127008, while the sum is 40.

The square root of 672623761 is about 25934.9910545579. The cubic root of 672623761 is about 876.1747534189.

The spelling of 672623761 in words is "six hundred seventy-two million, six hundred twenty-three thousand, seven hundred sixty-one".