1651665056660 has 12 divisors (see below), whose sum is σ = 3468496619028. Its totient is φ = 660666022656.

The previous prime is 1651665056641. The next prime is 1651665056677. The reversal of 1651665056660 is 666505661561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 536436126724 + 1115228929936 = 732418^2 + 1056044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41291626397 + ... + 41291626436.

It is an arithmetic number, because the mean of its divisors is an integer number (289041384919).

Almost surely, 2^{1651665056660} is an apocalyptic number.

1651665056660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651665056660 is an abundant number, since it is smaller than the sum of its proper divisors (1816831562368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651665056660 is a wasteful number, since it uses less digits than its factorization.

1651665056660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82583252842 (or 82583252840 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 1651665056660 in words is "one trillion, six hundred fifty-one billion, six hundred sixty-five million, fifty-six thousand, six hundred sixty".