77669142 has 32 divisors (see below), whose sum is σ = 160249344. Its totient is φ = 25077600.

The previous prime is 77669099. The next prime is 77669191. The reversal of 77669142 is 24196677.

It is a junction number, because it is equal to n+sod(n) for n = 77669094 and 77669103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59517 + ... + 60807.

It is an arithmetic number, because the mean of its divisors is an integer number (5007792).

Almost surely, 2^77669142 is an apocalyptic number.

77669142 is an abundant number, since it is smaller than the sum of its proper divisors (82580202).

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

77669142 is a wasteful number, since it uses less digits than its factorization.

77669142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604.

The product of its digits is 127008, while the sum is 42.

The square root of 77669142 is about 8813.0098150405. The cubic root of 77669142 is about 426.6608908995.

The spelling of 77669142 in words is "seventy-seven million, six hundred sixty-nine thousand, one hundred forty-two".