355426661 has 4 divisors (see below), whose sum is σ = 356569824. Its totient is φ = 354283500.

The previous prime is 355426657. The next prime is 355426693. The reversal of 355426661 is 166624553.

It is a happy number.

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: 166624553 = 2729 ⋅61057.

It is a cyclic number.

It is not a de Polignac number, because 355426661 - 2² = 355426657 is a prime.

It is a super-2 number, since 2×355426661² = 252656222699217842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355426651) 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, 571115 + ... + 571736.

It is an arithmetic number, because the mean of its divisors is an integer number (89142456).

Almost surely, 2^355426661 is an apocalyptic number.

It is an amenable number.

355426661 is a deficient number, since it is larger than the sum of its proper divisors (1143163).

355426661 is a wasteful number, since it uses less digits than its factorization.

355426661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143162.

The product of its digits is 129600, while the sum is 38.

The square root of 355426661 is about 18852.7626887944. The cubic root of 355426661 is about 708.3534289601.

The spelling of 355426661 in words is "three hundred fifty-five million, four hundred twenty-six thousand, six hundred sixty-one".