77550066 has 48 divisors (see below), whose sum is σ = 191280960. Its totient is φ = 22476960.

The previous prime is 77550059. The next prime is 77550091. The reversal of 77550066 is 66005577.

77550066 = T₁₅₆ + T₁₅₇ + ... + T₇₇₆.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 77550066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3961 + ... + 13068.

It is an arithmetic number, because the mean of its divisors is an integer number (3985020).

Almost surely, 2^77550066 is an apocalyptic number.

77550066 is an abundant number, since it is smaller than the sum of its proper divisors (113730894).

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

77550066 is a wasteful number, since it uses less digits than its factorization.

77550066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17071 (or 17068 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 77550066 is about 8806.2515294534. The cubic root of 77550066 is about 426.4427388060.

The spelling of 77550066 in words is "seventy-seven million, five hundred fifty thousand, sixty-six".