1665000051 has 48 divisors (see below), whose sum is σ = 2684140032. Its totient is φ = 911528640.

The previous prime is 1665000041. The next prime is 1665000083. The reversal of 1665000051 is 1500005661.

It is a de Polignac number, because none of the positive numbers 2^k-1665000051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664999985 and 1665000030.

It is not an unprimeable number, because it can be changed into a prime (1665000041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218040 + ... + 225546.

It is an arithmetic number, because the mean of its divisors is an integer number (55919584).

Almost surely, 2^1665000051 is an apocalyptic number.

1665000051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1665000051 is a deficient number, since it is larger than the sum of its proper divisors (1019139981).

1665000051 is a wasteful number, since it uses less digits than its factorization.

1665000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7592 (or 7581 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1665000051 is about 40804.4121511388. The cubic root of 1665000051 is about 1185.2357714210.

The spelling of 1665000051 in words is "one billion, six hundred sixty-five million, fifty-one", and thus it is an aban number.