977776 has 20 divisors (see below), whose sum is σ = 1977552. Its totient is φ = 467456.

The previous prime is 977761. The next prime is 977791. The reversal of 977776 is 677779.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (977761) and next prime (977791).

It is a nialpdrome in base 10 and base 16.

It is a congruent 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, 961 + ... + 1696.

2⁹⁷⁷⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

977776 is an abundant number, since it is smaller than the sum of its proper divisors (999776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

977776 is a wasteful number, since it uses less digits than its factorization.

977776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688 (or 2682 counting only the distinct ones).

The product of its digits is 129654, while the sum is 43.

The square root of 977776 is about 988.8255660125. The cubic root of 977776 is about 99.2536433765.

The spelling of 977776 in words is "nine hundred seventy-seven thousand, seven hundred seventy-six".