207680655 has 32 divisors (see below), whose sum is σ = 408973824. Its totient is φ = 87636096.

The previous prime is 207680647. The next prime is 207680657. The reversal of 207680655 is 556086702.

It is a happy number.

207680655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 207680655 - 2³ = 207680647 is a prime.

It is a super-2 number, since 2×207680655² = 86262508922458050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207680657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74709 + ... + 77438.

It is an arithmetic number, because the mean of its divisors is an integer number (12780432).

Almost surely, 2^207680655 is an apocalyptic number.

207680655 is a deficient number, since it is larger than the sum of its proper divisors (201293169).

207680655 is a wasteful number, since it uses less digits than its factorization.

207680655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152175.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 207680655 is about 14411.1295532307. The cubic root of 207680655 is about 592.1958345515.

It can be divided in two parts, 207680 and 655, that added together give a triangular number (208335 = T₆₄₅).

The spelling of 207680655 in words is "two hundred seven million, six hundred eighty thousand, six hundred fifty-five".