651666055 has 16 divisors (see below), whose sum is σ = 789294240. Its totient is φ = 516486528.

The previous prime is 651666031. The next prime is 651666073. The reversal of 651666055 is 550666156.

It is a cyclic number.

It is not a de Polignac number, because 651666055 - 2⁹ = 651665543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651665999 and 651666017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536629 + ... + 537841.

It is an arithmetic number, because the mean of its divisors is an integer number (49330890).

Almost surely, 2^651666055 is an apocalyptic number.

651666055 is a deficient number, since it is larger than the sum of its proper divisors (137628185).

651666055 is a wasteful number, since it uses less digits than its factorization.

651666055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 651666055 is about 25527.7506843043. The cubic root of 651666055 is about 866.9785774908.

The spelling of 651666055 in words is "six hundred fifty-one million, six hundred sixty-six thousand, fifty-five".