355240661 has 4 divisors (see below), whose sum is σ = 356361612. Its totient is φ = 354119712.

The previous prime is 355240657. The next prime is 355240679. The reversal of 355240661 is 166042553.

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 10432900 + 344807761 = 3230^2 + 18569^2 .

It is a cyclic number.

It is not a de Polignac number, because 355240661 - 2² = 355240657 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 (355240651) 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, 560000 + ... + 560633.

It is an arithmetic number, because the mean of its divisors is an integer number (89090403).

Almost surely, 2^355240661 is an apocalyptic number.

It is an amenable number.

355240661 is a deficient number, since it is larger than the sum of its proper divisors (1120951).

355240661 is a wasteful number, since it uses less digits than its factorization.

355240661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120950.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 355240661 is about 18847.8290792335. The cubic root of 355240661 is about 708.2298434764.

The spelling of 355240661 in words is "three hundred fifty-five million, two hundred forty thousand, six hundred sixty-one".