815666462351 has 24 divisors (see below), whose sum is σ = 903081599280. Its totient is φ = 732339055872.

The previous prime is 815666462323. The next prime is 815666462399. The reversal of 815666462351 is 153264666518.

It is not a de Polignac number, because 815666462351 - 2¹⁴ = 815666445967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815666462293 and 815666462302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815666462321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80205995 + ... + 80216163.

It is an arithmetic number, because the mean of its divisors is an integer number (37628399970).

Almost surely, 2^815666462351 is an apocalyptic number.

815666462351 is a deficient number, since it is larger than the sum of its proper divisors (87415136929).

815666462351 is a wasteful number, since it uses less digits than its factorization.

815666462351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14763 (or 14726 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 53.

The spelling of 815666462351 in words is "eight hundred fifteen billion, six hundred sixty-six million, four hundred sixty-two thousand, three hundred fifty-one".