3785240661 has 4 divisors (see below), whose sum is σ = 5046987552. Its totient is φ = 2523493772.

The previous prime is 3785240659. The next prime is 3785240671. The reversal of 3785240661 is 1660425873.

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 a cyclic number.

It is not a de Polignac number, because 3785240661 - 2¹ = 3785240659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3785240651) 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, 630873441 + ... + 630873446.

It is an arithmetic number, because the mean of its divisors is an integer number (1261746888).

Almost surely, 2^3785240661 is an apocalyptic number.

It is an amenable number.

3785240661 is a deficient number, since it is larger than the sum of its proper divisors (1261746891).

3785240661 is a wasteful number, since it uses less digits than its factorization.

3785240661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261746890.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 3785240661 is about 61524.3095125821. The cubic root of 3785240661 is about 1558.4677949793.

The spelling of 3785240661 in words is "three billion, seven hundred eighty-five million, two hundred forty thousand, six hundred sixty-one".