672774621 has 4 divisors (see below), whose sum is σ = 897032832. Its totient is φ = 448516412.

The previous prime is 672774607. The next prime is 672774631. The reversal of 672774621 is 126477276.

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 672774621 - 2¹³ = 672766429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672774601) 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, 112129101 + ... + 112129106.

It is an arithmetic number, because the mean of its divisors is an integer number (224258208).

Almost surely, 2^672774621 is an apocalyptic number.

It is an amenable number.

672774621 is a deficient number, since it is larger than the sum of its proper divisors (224258211).

672774621 is a wasteful number, since it uses less digits than its factorization.

672774621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224258210.

The product of its digits is 197568, while the sum is 42.

The square root of 672774621 is about 25937.8993174081. The cubic root of 672774621 is about 876.2402530589.

The spelling of 672774621 in words is "six hundred seventy-two million, seven hundred seventy-four thousand, six hundred twenty-one".