77151668 has 24 divisors (see below), whose sum is σ = 150885504. Its totient is φ = 34212800.

The previous prime is 77151667. The next prime is 77151673. The reversal of 77151668 is 86615177.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77151667) 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, 19580 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (6286896).

Almost surely, 2^77151668 is an apocalyptic number.

It is an amenable number.

77151668 is a deficient number, since it is larger than the sum of its proper divisors (73733836).

77151668 is a wasteful number, since it uses less digits than its factorization.

77151668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42823 (or 42821 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 77151668 is about 8783.6022223231. The cubic root of 77151668 is about 425.7112298669.

The spelling of 77151668 in words is "seventy-seven million, one hundred fifty-one thousand, six hundred sixty-eight".