345556677 has 4 divisors (see below), whose sum is σ = 460742240. Its totient is φ = 230371116.

The previous prime is 345556633. The next prime is 345556681. The reversal of 345556677 is 776655543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 776655543 = 3 ⋅258885181.

It is not a de Polignac number, because 345556677 - 2¹⁰ = 345555653 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345536677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57592777 + ... + 57592782.

It is an arithmetic number, because the mean of its divisors is an integer number (115185560).

Almost surely, 2^345556677 is an apocalyptic number.

It is an amenable number.

345556677 is a deficient number, since it is larger than the sum of its proper divisors (115185563).

345556677 is a wasteful number, since it uses less digits than its factorization.

345556677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115185562.

The product of its digits is 2646000, while the sum is 48.

The square root of 345556677 is about 18589.1548220999. The cubic root of 345556677 is about 701.7349325150.

The spelling of 345556677 in words is "three hundred forty-five million, five hundred fifty-six thousand, six hundred seventy-seven".