77161660 has 24 divisors (see below), whose sum is σ = 170568720. Its totient is φ = 29240064.

The previous prime is 77161627. The next prime is 77161661. The reversal of 77161660 is 6616177.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161661) 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 7 ways as a sum of consecutive naturals, for example, 101149 + ... + 101908.

It is an arithmetic number, because the mean of its divisors is an integer number (7107030).

Almost surely, 2^77161660 is an apocalyptic number.

It is an amenable number.

77161660 is an abundant number, since it is smaller than the sum of its proper divisors (93407060).

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

77161660 is a wasteful number, since it uses less digits than its factorization.

77161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203085 (or 203083 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 77161660 is about 8784.1709910498. The cubic root of 77161660 is about 425.7296071883.

The spelling of 77161660 in words is "seventy-seven million, one hundred sixty-one thousand, six hundred sixty".