77969466 has 56 divisors (see below), whose sum is σ = 178836660. Its totient is φ = 25474176.

The previous prime is 77969459. The next prime is 77969467. The reversal of 77969466 is 66496977.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 18225 = 8829^2 + 135^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (77969467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 76770 + ... + 77778.

Almost surely, 2^77969466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77969466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89418330).

77969466 is an abundant number, since it is smaller than the sum of its proper divisors (100867194).

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

77969466 is a wasteful number, since it uses less digits than its factorization.

77969466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1067 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 77969466 is about 8830.0320497720. The cubic root of 77969466 is about 427.2101081752.

The spelling of 77969466 in words is "seventy-seven million, nine hundred sixty-nine thousand, four hundred sixty-six".