75977645 has 8 divisors (see below), whose sum is σ = 91226520. Its totient is φ = 60746560.

The previous prime is 75977639. The next prime is 75977677. The reversal of 75977645 is 54677957.

It can be written as a sum of positive squares in 4 ways, for example, as 9815689 + 66161956 = 3133^2 + 8134^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75977645 - 2⁸ = 75977389 is a prime.

It is a super-3 number, since 3×75977645³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 75977593 and 75977602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8255 + ... + 14835.

It is an arithmetic number, because the mean of its divisors is an integer number (11403315).

Almost surely, 2^75977645 is an apocalyptic number.

It is an amenable number.

75977645 is a deficient number, since it is larger than the sum of its proper divisors (15248875).

75977645 is a wasteful number, since it uses less digits than its factorization.

75977645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895.

The product of its digits is 1852200, while the sum is 50.

The square root of 75977645 is about 8716.5156456006. The cubic root of 75977645 is about 423.5408228456.

The spelling of 75977645 in words is "seventy-five million, nine hundred seventy-seven thousand, six hundred forty-five".