345700661 has 4 divisors (see below), whose sum is σ = 366036012. Its totient is φ = 325365312.

The previous prime is 345700639. The next prime is 345700697. The reversal of 345700661 is 166007543.

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 303839761 + 41860900 = 17431^2 + 6470^2 .

It is not a de Polignac number, because 345700661 - 2²² = 341506357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345700261) 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, 10167650 + ... + 10167683.

It is an arithmetic number, because the mean of its divisors is an integer number (91509003).

Almost surely, 2^345700661 is an apocalyptic number.

It is an amenable number.

345700661 is a deficient number, since it is larger than the sum of its proper divisors (20335351).

345700661 is a wasteful number, since it uses less digits than its factorization.

345700661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335350.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 345700661 is about 18593.0272145232. The cubic root of 345700661 is about 701.8323835548.

The spelling of 345700661 in words is "three hundred forty-five million, seven hundred thousand, six hundred sixty-one".