665010166051 has 16 divisors (see below), whose sum is σ = 831027299328. Its totient is φ = 516987417600.

The previous prime is 665010166049. The next prime is 665010166087. The reversal of 665010166051 is 150661010566.

It is a cyclic number.

It is not a de Polignac number, because 665010166051 - 2¹ = 665010166049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665010166051.

It is not an unprimeable number, because it can be changed into a prime (665010166001) 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, 9985950 + ... + 10052323.

It is an arithmetic number, because the mean of its divisors is an integer number (51939206208).

Almost surely, 2^665010166051 is an apocalyptic number.

665010166051 is a deficient number, since it is larger than the sum of its proper divisors (166017133277).

665010166051 is a wasteful number, since it uses less digits than its factorization.

665010166051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20038722.

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

The spelling of 665010166051 in words is "six hundred sixty-five billion, ten million, one hundred sixty-six thousand, fifty-one".