672876661 has 4 divisors (see below), whose sum is σ = 702132192. Its totient is φ = 643621132.

The previous prime is 672876641. The next prime is 672876671. The reversal of 672876661 is 166678276.

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 672876661 - 2²³ = 664488053 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 (672876641) 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, 14627731 + ... + 14627776.

It is an arithmetic number, because the mean of its divisors is an integer number (175533048).

Almost surely, 2^672876661 is an apocalyptic number.

It is an amenable number.

672876661 is a deficient number, since it is larger than the sum of its proper divisors (29255531).

672876661 is a wasteful number, since it uses less digits than its factorization.

672876661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29255530.

The product of its digits is 1016064, while the sum is 49.

The square root of 672876661 is about 25939.8662486914. The cubic root of 672876661 is about 876.2845507244.

The spelling of 672876661 in words is "six hundred seventy-two million, eight hundred seventy-six thousand, six hundred sixty-one".