3476720166521 has 16 divisors (see below), whose sum is σ = 3976955043840. Its totient is φ = 2977376164560.

The previous prime is 3476720166463. The next prime is 3476720166527. The reversal of 3476720166521 is 1256610276743.

It is a de Polignac number, because none of the positive numbers 2^k-3476720166521 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 3476720166521.

It is not an unprimeable number, because it can be changed into a prime (3476720166527) 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, 65722160 + ... + 65775038.

It is an arithmetic number, because the mean of its divisors is an integer number (248559690240).

Almost surely, 2^{3476720166521} is an apocalyptic number.

It is an amenable number.

3476720166521 is a deficient number, since it is larger than the sum of its proper divisors (500234877319).

3476720166521 is a wasteful number, since it uses less digits than its factorization.

3476720166521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61124.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 3476720166521 in words is "three trillion, four hundred seventy-six billion, seven hundred twenty million, one hundred sixty-six thousand, five hundred twenty-one".