677658981 has 16 divisors (see below), whose sum is σ = 957590208. Its totient is φ = 424800000.

The previous prime is 677658967. The next prime is 677658991. The reversal of 677658981 is 189856776.

It is not a de Polignac number, because 677658981 - 2¹¹ = 677656933 is a prime.

It is a super-2 number, since 2×677658981² = 918443389059916722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677658931) 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 15 ways as a sum of consecutive naturals, for example, 54606 + ... + 65856.

It is an arithmetic number, because the mean of its divisors is an integer number (59849388).

Almost surely, 2^677658981 is an apocalyptic number.

It is an amenable number.

677658981 is a deficient number, since it is larger than the sum of its proper divisors (279931227).

677658981 is a wasteful number, since it uses less digits than its factorization.

677658981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452.

The product of its digits is 5080320, while the sum is 57.

The square root of 677658981 is about 26031.8839310565. The cubic root of 677658981 is about 878.3556504773.

The spelling of 677658981 in words is "six hundred seventy-seven million, six hundred fifty-eight thousand, nine hundred eighty-one".