672774401 has 12 divisors (see below), whose sum is σ = 764671572. Its totient is φ = 588333024.

The previous prime is 672774379. The next prime is 672774409. The reversal of 672774401 is 104477276.

It can be written as a sum of positive squares in 2 ways, for example, as 363893776 + 308880625 = 19076^2 + 17575^2 .

It is not a de Polignac number, because 672774401 - 2¹⁸ = 672512257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672774409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66986 + ... + 76371.

It is an arithmetic number, because the mean of its divisors is an integer number (63722631).

Almost surely, 2^672774401 is an apocalyptic number.

It is an amenable number.

672774401 is a deficient number, since it is larger than the sum of its proper divisors (91897171).

672774401 is a wasteful number, since it uses less digits than its factorization.

672774401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143408 (or 143389 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 672774401 is about 25937.8950765092. The cubic root of 672774401 is about 876.2401575475.

The spelling of 672774401 in words is "six hundred seventy-two million, seven hundred seventy-four thousand, four hundred one".