1616665051 has 2 divisors, whose sum is σ = 1616665052. Its totient is φ = 1616665050.

The previous prime is 1616664979. The next prime is 1616665067. The reversal of 1616665051 is 1505666161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1616665051 - 2⁷ = 1616664923 is a prime.

It is a super-2 number, since 2×1616665051² = 5227211774249665202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1616665051.

It is not a weakly prime, because it can be changed into another prime (1616665651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808332525 + 808332526.

It is an arithmetic number, because the mean of its divisors is an integer number (808332526).

Almost surely, 2^1616665051 is an apocalyptic number.

1616665051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616665051 is an equidigital number, since it uses as much as digits as its factorization.

1616665051 is an evil number, because the sum of its binary digits is even.

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

The square root of 1616665051 is about 40207.7735145830. The cubic root of 1616665051 is about 1173.6538199322.

The spelling of 1616665051 in words is "one billion, six hundred sixteen million, six hundred sixty-five thousand, fifty-one".