345566779 has 4 divisors (see below), whose sum is σ = 345622984. Its totient is φ = 345510576.

The previous prime is 345566773. The next prime is 345566801. The reversal of 345566779 is 977665543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977665543 = 17053 ⋅57331.

It is a cyclic number.

It is not a de Polignac number, because 345566779 - 2⁵ = 345566747 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (345566773) 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, 17562 + ... + 31615.

It is an arithmetic number, because the mean of its divisors is an integer number (86405746).

Almost surely, 2^345566779 is an apocalyptic number.

345566779 is a deficient number, since it is larger than the sum of its proper divisors (56205).

345566779 is an equidigital number, since it uses as much as digits as its factorization.

345566779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56204.

The product of its digits is 4762800, while the sum is 52.

The square root of 345566779 is about 18589.4265376853. The cubic root of 345566779 is about 701.7417706188.

The spelling of 345566779 in words is "three hundred forty-five million, five hundred sixty-six thousand, seven hundred seventy-nine".