2051668668507 has 32 divisors (see below), whose sum is σ = 2804921104128. Its totient is φ = 1333230627456.

The previous prime is 2051668668503. The next prime is 2051668668563. The reversal of 2051668668507 is 7058668661502.

It is a happy number.

It is not a de Polignac number, because 2051668668507 - 2² = 2051668668503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051668668503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179288928 + ... + 179300370.

It is an arithmetic number, because the mean of its divisors is an integer number (87653784504).

Almost surely, 2^{2051668668507} is an apocalyptic number.

2051668668507 is a deficient number, since it is larger than the sum of its proper divisors (753252435621).

2051668668507 is a wasteful number, since it uses less digits than its factorization.

2051668668507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14219.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 2051668668507 in words is "two trillion, fifty-one billion, six hundred sixty-eight million, six hundred sixty-eight thousand, five hundred seven".