77773331 has 8 divisors (see below), whose sum is σ = 80953680. Its totient is φ = 74626272.

The previous prime is 77773321. The next prime is 77773337. The reversal of 77773331 is 13337777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77773331 is a prime.

It is a super-2 number, since 2×77773331² = 12097382029671122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (77773337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3500 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (10119210).

Almost surely, 2^77773331 is an apocalyptic number.

77773331 is a deficient number, since it is larger than the sum of its proper divisors (3180349).

77773331 is a wasteful number, since it uses less digits than its factorization.

77773331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16645.

The product of its digits is 64827, while the sum is 38.

The square root of 77773331 is about 8818.9189246755. The cubic root of 77773331 is about 426.8515865775.

The spelling of 77773331 in words is "seventy-seven million, seven hundred seventy-three thousand, three hundred thirty-one".