1566116651 has 16 divisors (see below), whose sum is σ = 1735209216. Its totient is φ = 1401540000.

The previous prime is 1566116641. The next prime is 1566116681.

1566116651 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1566116651 - 2¹⁰ = 1566115627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1566116611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733856 + ... + 735986.

It is an arithmetic number, because the mean of its divisors is an integer number (108450576).

Almost surely, 2^1566116651 is an apocalyptic number.

1566116651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1566116651 is a deficient number, since it is larger than the sum of its proper divisors (169092565).

1566116651 is a wasteful number, since it uses less digits than its factorization.

1566116651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154.

The product of its digits is 32400, while the sum is 38.

The square root of 1566116651 is about 39574.1917289539. The cubic root of 1566116651 is about 1161.2918255485.

The spelling of 1566116651 in words is "one billion, five hundred sixty-six million, one hundred sixteen thousand, six hundred fifty-one".