77425861 has 8 divisors (see below), whose sum is σ = 78566400. Its totient is φ = 76293360.

The previous prime is 77425849. The next prime is 77425883. The reversal of 77425861 is 16852477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77425861 - 2¹⁵ = 77393093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77425811) 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, 18960 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (9820800).

Almost surely, 2^77425861 is an apocalyptic number.

It is an amenable number.

77425861 is a deficient number, since it is larger than the sum of its proper divisors (1140539).

77425861 is a wasteful number, since it uses less digits than its factorization.

77425861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019.

The product of its digits is 94080, while the sum is 40.

The square root of 77425861 is about 8799.1966110549. The cubic root of 77425861 is about 426.2149520981.

The spelling of 77425861 in words is "seventy-seven million, four hundred twenty-five thousand, eight hundred sixty-one".