652216678 has 4 divisors (see below), whose sum is σ = 978325020. Its totient is φ = 326108338.

The previous prime is 652216661. The next prime is 652216687. The reversal of 652216678 is 876612256.

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

It is a super-2 number, since 2×652216678² = 850773190122711368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163054168 + ... + 163054171.

It is an arithmetic number, because the mean of its divisors is an integer number (244581255).

Almost surely, 2^652216678 is an apocalyptic number.

652216678 is a deficient number, since it is larger than the sum of its proper divisors (326108342).

652216678 is a wasteful number, since it uses less digits than its factorization.

652216678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326108341.

The product of its digits is 241920, while the sum is 43.

The square root of 652216678 is about 25538.5331998531. The cubic root of 652216678 is about 867.2226922750. Note that the first 3 decimals are identical.

The spelling of 652216678 in words is "six hundred fifty-two million, two hundred sixteen thousand, six hundred seventy-eight".