677667381 has 16 divisors (see below), whose sum is σ = 933586560. Its totient is φ = 437003840.

The previous prime is 677667373. The next prime is 677667407. The reversal of 677667381 is 183766776.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 677667381 - 2³ = 677667373 is a prime.

It is a super-2 number, since 2×677667381² = 918466158542798322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677667371) 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, 18726 + ... + 41303.

It is an arithmetic number, because the mean of its divisors is an integer number (58349160).

Almost surely, 2^677667381 is an apocalyptic number.

It is an amenable number.

677667381 is a deficient number, since it is larger than the sum of its proper divisors (255919179).

677667381 is a wasteful number, since it uses less digits than its factorization.

677667381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60156.

The product of its digits is 1778112, while the sum is 51.

The square root of 677667381 is about 26032.0452711653. The cubic root of 677667381 is about 878.3592797152.

The spelling of 677667381 in words is "six hundred seventy-seven million, six hundred sixty-seven thousand, three hundred eighty-one".