77650716 has 96 divisors (see below), whose sum is σ = 218792448. Its totient is φ = 21116160.

The previous prime is 77650711. The next prime is 77650717. The reversal of 77650716 is 61705677.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77650711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62881 + ... + 64103.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^77650716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77650716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109396224).

77650716 is an abundant number, since it is smaller than the sum of its proper divisors (141141732).

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

77650716 is a wasteful number, since it uses less digits than its factorization.

77650716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 77650716 is about 8811.9643667005. The cubic root of 77650716 is about 426.6271483039.

The spelling of 77650716 in words is "seventy-seven million, six hundred fifty thousand, seven hundred sixteen".