77332505 has 4 divisors (see below), whose sum is σ = 92799012. Its totient is φ = 61866000.

The previous prime is 77332483. The next prime is 77332517. The reversal of 77332505 is 50523377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50523377 = 337 ⋅149921.

It can be written as a sum of positive squares in 2 ways, for example, as 8508889 + 68823616 = 2917^2 + 8296^2 .

It is not a de Polignac number, because 77332505 - 2¹⁴ = 77316121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733246 + ... + 7733255.

It is an arithmetic number, because the mean of its divisors is an integer number (23199753).

Almost surely, 2^77332505 is an apocalyptic number.

It is an amenable number.

77332505 is a deficient number, since it is larger than the sum of its proper divisors (15466507).

77332505 is a wasteful number, since it uses less digits than its factorization.

77332505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15466506.

The product of its (nonzero) digits is 22050, while the sum is 32.

The square root of 77332505 is about 8793.8902085482. The cubic root of 77332505 is about 426.0435807354.

The spelling of 77332505 in words is "seventy-seven million, three hundred thirty-two thousand, five hundred five".