3820233661 has 4 divisors (see below), whose sum is σ = 3820953472. Its totient is φ = 3819513852.

The previous prime is 3820233631. The next prime is 3820233667. The reversal of 3820233661 is 1663320283.

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: 1663320283 = 31 ⋅53655493.

It is a cyclic number.

It is not a de Polignac number, because 3820233661 - 2²³ = 3811845053 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 (3820233667) 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, 351885 + ... + 362578.

It is an arithmetic number, because the mean of its divisors is an integer number (955238368).

Almost surely, 2^3820233661 is an apocalyptic number.

It is an amenable number.

3820233661 is a deficient number, since it is larger than the sum of its proper divisors (719811).

3820233661 is an equidigital number, since it uses as much as digits as its factorization.

3820233661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719810.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 3820233661 is about 61808.0388056440. The cubic root of 3820233661 is about 1563.2555371211.

The spelling of 3820233661 in words is "three billion, eight hundred twenty million, two hundred thirty-three thousand, six hundred sixty-one".