3664218969 has 6 divisors (see below), whose sum is σ = 5292760746. Its totient is φ = 2442812640.

The previous prime is 3664218953. The next prime is 3664218997. The reversal of 3664218969 is 9698124663.

3664218969 is a `hidden beast` number, since 366 + 4 + 218 + 9 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2637849600 + 1026369369 = 51360^2 + 32037^2 .

It is not a de Polignac number, because 3664218969 - 2⁴ = 3664218953 is a prime.

It is a super-2 number, since 2×3664218969² = 26853001305558845922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3664218919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203567712 + ... + 203567729.

It is an arithmetic number, because the mean of its divisors is an integer number (882126791).

Almost surely, 2^3664218969 is an apocalyptic number.

It is an amenable number.

3664218969 is a deficient number, since it is larger than the sum of its proper divisors (1628541777).

3664218969 is a wasteful number, since it uses less digits than its factorization.

3664218969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407135447 (or 407135444 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 3664218969 is about 60532.7925095150. The cubic root of 3664218969 is about 1541.6784658160.

It can be divided in two parts, 36642 and 18969, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 3664218969 in words is "three billion, six hundred sixty-four million, two hundred eighteen thousand, nine hundred sixty-nine".