77577506 has 8 divisors (see below), whose sum is σ = 116819820. Its totient is φ = 38637568.

The previous prime is 77577503. The next prime is 77577553. The reversal of 77577506 is 60577577.

It can be written as a sum of positive squares in 2 ways, for example, as 53655625 + 23921881 = 7325^2 + 4891^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77577503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74951 + ... + 75978.

Almost surely, 2^77577506 is an apocalyptic number.

77577506 is a deficient number, since it is larger than the sum of its proper divisors (39242314).

77577506 is a wasteful number, since it uses less digits than its factorization.

77577506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151188.

The product of its (nonzero) digits is 360150, while the sum is 44.

The square root of 77577506 is about 8807.8093757756. The cubic root of 77577506 is about 426.4930297964.

The spelling of 77577506 in words is "seventy-seven million, five hundred seventy-seven thousand, five hundred six".