77620366 has 4 divisors (see below), whose sum is σ = 116430552. Its totient is φ = 38810182.

The previous prime is 77620363. The next prime is 77620379. The reversal of 77620366 is 66302677.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19405090 + ... + 19405093.

It is an arithmetic number, because the mean of its divisors is an integer number (29107638).

Almost surely, 2^77620366 is an apocalyptic number.

77620366 is a deficient number, since it is larger than the sum of its proper divisors (38810186).

77620366 is a wasteful number, since it uses less digits than its factorization.

77620366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38810185.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 77620366 is about 8810.2421079105. The cubic root of 77620366 is about 426.5715582551.

The spelling of 77620366 in words is "seventy-seven million, six hundred twenty thousand, three hundred sixty-six".