3667666669 has 4 divisors (see below), whose sum is σ = 3669426144. Its totient is φ = 3665907196.

The previous prime is 3667666591. The next prime is 3667666703. The reversal of 3667666669 is 9666667663.

It is a happy number.

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: 9666667663 = 197 ⋅49069379.

It is a cyclic number.

It is not a de Polignac number, because 3667666669 - 2⁹ = 3667666157 is a prime.

It is a super-2 number, since 2×3667666669² = 26903557589787111122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3667666069) 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, 876607 + ... + 880780.

It is an arithmetic number, because the mean of its divisors is an integer number (917356536).

Almost surely, 2^3667666669 is an apocalyptic number.

It is an amenable number.

3667666669 is a deficient number, since it is larger than the sum of its proper divisors (1759475).

3667666669 is a wasteful number, since it uses less digits than its factorization.

3667666669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759474.

The product of its digits is 52907904, while the sum is 61.

The square root of 3667666669 is about 60561.2637665364. The cubic root of 3667666669 is about 1542.1618411007.

The spelling of 3667666669 in words is "three billion, six hundred sixty-seven million, six hundred sixty-six thousand, six hundred sixty-nine".