3664778061 has 24 divisors (see below), whose sum is σ = 5686467744. Its totient is φ = 2093303520.

The previous prime is 3664778059. The next prime is 3664778081. The reversal of 3664778061 is 1608774663.

It is not a de Polignac number, because 3664778061 - 2¹ = 3664778059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3664778061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664778081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598626 + ... + 604716.

It is an arithmetic number, because the mean of its divisors is an integer number (236936156).

Almost surely, 2^3664778061 is an apocalyptic number.

It is an amenable number.

3664778061 is a deficient number, since it is larger than the sum of its proper divisors (2021689683).

3664778061 is a wasteful number, since it uses less digits than its factorization.

3664778061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201 (or 10194 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 3664778061 is about 60537.4104252899. The cubic root of 3664778061 is about 1541.7568723623.

The spelling of 3664778061 in words is "three billion, six hundred sixty-four million, seven hundred seventy-eight thousand, sixty-one".