3774066661 has 4 divisors (see below), whose sum is σ = 3783074400. Its totient is φ = 3765058924.

The previous prime is 3774066643. The next prime is 3774066679. The reversal of 3774066661 is 1666604773.

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.

It is an interprime number because it is at equal distance from previous prime (3774066643) and next prime (3774066679).

It is a cyclic number.

It is not a de Polignac number, because 3774066661 - 2¹³ = 3774058469 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 (3774066631) 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, 4503241 + ... + 4504078.

It is an arithmetic number, because the mean of its divisors is an integer number (945768600).

Almost surely, 2^3774066661 is an apocalyptic number.

It is an amenable number.

3774066661 is a deficient number, since it is larger than the sum of its proper divisors (9007739).

3774066661 is an equidigital number, since it uses as much as digits as its factorization.

3774066661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9007738.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 3774066661 is about 61433.4327626253. The cubic root of 3774066661 is about 1556.9327553782.

It can be divided in two parts, 37740 and 66661, that added together give a palindrome (104401).

The spelling of 3774066661 in words is "three billion, seven hundred seventy-four million, sixty-six thousand, six hundred sixty-one".