78361668 has 168 divisors, whose sum is σ = 257073600. Its totient is φ = 20295360.

The previous prime is 78361663. The next prime is 78361693. The reversal of 78361668 is 86616387.

It is a super-2 number, since 2×78361668² = 12281102023484448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78361663) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 224358 + ... + 224706.

It is an arithmetic number, because the mean of its divisors is an integer number (1530200).

Almost surely, 2^78361668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78361668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128536800).

78361668 is an abundant number, since it is smaller than the sum of its proper divisors (178711932).

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

78361668 is a wasteful number, since it uses less digits than its factorization.

78361668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 372 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 78361668 is about 8852.2126047672. The cubic root of 78361668 is about 427.9252278615.

The spelling of 78361668 in words is "seventy-eight million, three hundred sixty-one thousand, six hundred sixty-eight".