3656664542 has 4 divisors (see below), whose sum is σ = 5484996816. Its totient is φ = 1828332270.

The previous prime is 3656664533. The next prime is 3656664569. The reversal of 3656664542 is 2454666563.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914166134 + ... + 914166137.

It is an arithmetic number, because the mean of its divisors is an integer number (1371249204).

Almost surely, 2^3656664542 is an apocalyptic number.

3656664542 is a deficient number, since it is larger than the sum of its proper divisors (1828332274).

3656664542 is a wasteful number, since it uses less digits than its factorization.

3656664542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828332273.

The product of its digits is 3110400, while the sum is 47.

The square root of 3656664542 is about 60470.3608555464. The cubic root of 3656664542 is about 1540.6182571269.

The spelling of 3656664542 in words is "three billion, six hundred fifty-six million, six hundred sixty-four thousand, five hundred forty-two".