677722481 has 4 divisors (see below), whose sum is σ = 679412964. Its totient is φ = 676032000.

The previous prime is 677722471. The next prime is 677722499. The reversal of 677722481 is 184227776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 675532081 + 2190400 = 25991^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 677722481 - 2¹⁸ = 677460337 is a prime.

It is a super-2 number, since 2×677722481² = 918615522505590722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677722421) 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, 844640 + ... + 845441.

It is an arithmetic number, because the mean of its divisors is an integer number (169853241).

Almost surely, 2^677722481 is an apocalyptic number.

It is an amenable number.

677722481 is a deficient number, since it is larger than the sum of its proper divisors (1690483).

677722481 is a wasteful number, since it uses less digits than its factorization.

677722481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690482.

The product of its digits is 263424, while the sum is 44.

The square root of 677722481 is about 26033.1035606591. The cubic root of 677722481 is about 878.3830850441.

The spelling of 677722481 in words is "six hundred seventy-seven million, seven hundred twenty-two thousand, four hundred eighty-one".