3665622154 has 4 divisors (see below), whose sum is σ = 5498433234. Its totient is φ = 1832811076.

The previous prime is 3665622071. The next prime is 3665622197. The reversal of 3665622154 is 4512265663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4512265663 = 4003 ⋅1127221.

It can be written as a sum of positive squares in only one way, i.e., 3560866929 + 104755225 = 59673^2 + 10235^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 916405537 + ... + 916405540.

Almost surely, 2^3665622154 is an apocalyptic number.

3665622154 is a deficient number, since it is larger than the sum of its proper divisors (1832811080).

3665622154 is a wasteful number, since it uses less digits than its factorization.

3665622154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832811079.

The product of its digits is 259200, while the sum is 40.

The square root of 3665622154 is about 60544.3816881468. The cubic root of 3665622154 is about 1541.8752320792.

The spelling of 3665622154 in words is "three billion, six hundred sixty-five million, six hundred twenty-two thousand, one hundred fifty-four".