1656106651 has 8 divisors (see below), whose sum is σ = 1743968160. Its totient is φ = 1569566592.

The previous prime is 1656106619. The next prime is 1656106681. The reversal of 1656106651 is 1566016561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1656106651 - 2⁵ = 1656106619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1656106651.

It is not an unprimeable number, because it can be changed into a prime (1656106681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327790 + ... + 332803.

It is an arithmetic number, because the mean of its divisors is an integer number (217996020).

Almost surely, 2^1656106651 is an apocalyptic number.

1656106651 is a deficient number, since it is larger than the sum of its proper divisors (87861509).

1656106651 is a wasteful number, since it uses less digits than its factorization.

1656106651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660725.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1656106651 is about 40695.2902803261. The cubic root of 1656106651 is about 1183.1217376251.

The spelling of 1656106651 in words is "one billion, six hundred fifty-six million, one hundred six thousand, six hundred fifty-one".