77345672 has 16 divisors (see below), whose sum is σ = 145121100. Its totient is φ = 38646720.

The previous prime is 77345659. The next prime is 77345677. The reversal of 77345672 is 27654377.

It can be written as a sum of positive squares in 2 ways, for example, as 77334436 + 11236 = 8794^2 + 106^2 .

It is a super-3 number, since 3×77345672³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (77345677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16022 + ... + 20282.

Almost surely, 2^77345672 is an apocalyptic number.

It is an amenable number.

77345672 is a deficient number, since it is larger than the sum of its proper divisors (67775428).

77345672 is a wasteful number, since it uses less digits than its factorization.

77345672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536 (or 6532 counting only the distinct ones).

The product of its digits is 246960, while the sum is 41.

The square root of 77345672 is about 8794.6388214639. The cubic root of 77345672 is about 426.0677594318.

The spelling of 77345672 in words is "seventy-seven million, three hundred forty-five thousand, six hundred seventy-two".