76745745 has 32 divisors (see below), whose sum is σ = 141148800. Its totient is φ = 39517632.

The previous prime is 76745729. The next prime is 76745789. The reversal of 76745745 is 54754767.

76745745 is a `hidden beast` number, since 7 + 6 + 74 + 574 + 5 = 666.

It is not a de Polignac number, because 76745745 - 2⁴ = 76745729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 76745745.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5887 + ... + 13716.

It is an arithmetic number, because the mean of its divisors is an integer number (4410900).

Almost surely, 2^76745745 is an apocalyptic number.

It is an amenable number.

76745745 is a deficient number, since it is larger than the sum of its proper divisors (64403055).

76745745 is a wasteful number, since it uses less digits than its factorization.

76745745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19646 (or 19640 counting only the distinct ones).

The product of its digits is 823200, while the sum is 45.

The square root of 76745745 is about 8760.4648849248. The cubic root of 76745745 is about 424.9633094046.

The spelling of 76745745 in words is "seventy-six million, seven hundred forty-five thousand, seven hundred forty-five".