78327746466 has 16 divisors (see below), whose sum is σ = 165870522144. Its totient is φ = 24573410624.

The previous prime is 78327746461. The next prime is 78327746479. The reversal of 78327746466 is 66464772387.

It is a super-2 number, since 2×78327746466² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78327746461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383959440 + ... + 383959643.

It is an arithmetic number, because the mean of its divisors is an integer number (10366907634).

Almost surely, 2^78327746466 is an apocalyptic number.

78327746466 is an abundant number, since it is smaller than the sum of its proper divisors (87542775678).

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

78327746466 is a wasteful number, since it uses less digits than its factorization.

78327746466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767919105.

The product of its digits is 56899584, while the sum is 60.

The spelling of 78327746466 in words is "seventy-eight billion, three hundred twenty-seven million, seven hundred forty-six thousand, four hundred sixty-six".