77770070 has 32 divisors (see below), whose sum is σ = 169397568. Its totient is φ = 25095168.

The previous prime is 77770057. The next prime is 77770079. The reversal of 77770070 is 7007777.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77770070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31487 + ... + 33866.

It is an arithmetic number, because the mean of its divisors is an integer number (5293674).

Almost surely, 2^77770070 is an apocalyptic number.

77770070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77770070 is an abundant number, since it is smaller than the sum of its proper divisors (91627498).

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

77770070 is a wasteful number, since it uses less digits than its factorization.

77770070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65384.

The product of its (nonzero) digits is 16807, while the sum is 35.

The square root of 77770070 is about 8818.7340361301. The cubic root of 77770070 is about 426.8456205972.

The spelling of 77770070 in words is "seventy-seven million, seven hundred seventy thousand, seventy".