672646277 has 4 divisors (see below), whose sum is σ = 694344576. Its totient is φ = 650947980.

The previous prime is 672646237. The next prime is 672646283. The reversal of 672646277 is 772646276.

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 a de Polignac number, because none of the positive numbers 2^k-672646277 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 (672646237) 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, 10849103 + ... + 10849164.

It is an arithmetic number, because the mean of its divisors is an integer number (173586144).

Almost surely, 2^672646277 is an apocalyptic number.

It is an amenable number.

672646277 is a deficient number, since it is larger than the sum of its proper divisors (21698299).

672646277 is a wasteful number, since it uses less digits than its factorization.

672646277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21698298.

The product of its digits is 1185408, while the sum is 47.

The square root of 672646277 is about 25935.4251362880. The cubic root of 672646277 is about 876.1845299249.

Subtracting 672646277 from its reverse (772646276), we obtain a palindrome (99999999).

The spelling of 672646277 in words is "six hundred seventy-two million, six hundred forty-six thousand, two hundred seventy-seven".