77068557 has 8 divisors (see below), whose sum is σ = 114175680. Its totient is φ = 51379020.

The previous prime is 77068493. The next prime is 77068601. The reversal of 77068557 is 75586077.

It is not a de Polignac number, because 77068557 - 2⁶ = 77068493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77068357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427169 + ... + 1427222.

It is an arithmetic number, because the mean of its divisors is an integer number (14271960).

Almost surely, 2^77068557 is an apocalyptic number.

It is an amenable number.

77068557 is a deficient number, since it is larger than the sum of its proper divisors (37107123).

77068557 is a wasteful number, since it uses less digits than its factorization.

77068557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854400 (or 2854394 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The square root of 77068557 is about 8778.8699158833. The cubic root of 77068557 is about 425.5583103026.

The spelling of 77068557 in words is "seventy-seven million, sixty-eight thousand, five hundred fifty-seven".