1566561051 has 24 divisors (see below), whose sum is σ = 2470613184. Its totient is φ = 948626160.

The previous prime is 1566561049. The next prime is 1566561071. The reversal of 1566561051 is 1501656651.

It is not a de Polignac number, because 1566561051 - 2¹ = 1566561049 is a prime.

It is a super-2 number, since 2×1566561051² = 4908227053020449202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1566560997 and 1566561015.

It is not an unprimeable number, because it can be changed into a prime (1566561071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123340 + ... + 135446.

It is an arithmetic number, because the mean of its divisors is an integer number (102942216).

Almost surely, 2^1566561051 is an apocalyptic number.

1566561051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1566561051 is a deficient number, since it is larger than the sum of its proper divisors (904052133).

1566561051 is a wasteful number, since it uses less digits than its factorization.

1566561051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13431 (or 13428 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1566561051 is about 39579.8061010915. The cubic root of 1566561051 is about 1161.4016575717.

The spelling of 1566561051 in words is "one billion, five hundred sixty-six million, five hundred sixty-one thousand, fifty-one".