672820779 has 16 divisors (see below), whose sum is σ = 922212864. Its totient is φ = 436161600.

The previous prime is 672820777. The next prime is 672820829. The reversal of 672820779 is 977028276.

It is not a de Polignac number, because 672820779 - 2¹ = 672820777 is a prime.

It is a super-4 number, since 4×672820779⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (672820777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6087 + ... + 37184.

It is an arithmetic number, because the mean of its divisors is an integer number (57638304).

Almost surely, 2^672820779 is an apocalyptic number.

672820779 is a deficient number, since it is larger than the sum of its proper divisors (249392085).

672820779 is a wasteful number, since it uses less digits than its factorization.

672820779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43418.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 672820779 is about 25938.7890812197. The cubic root of 672820779 is about 876.2602917521.

The spelling of 672820779 in words is "six hundred seventy-two million, eight hundred twenty thousand, seven hundred seventy-nine".