77152666 has 8 divisors (see below), whose sum is σ = 115784820. Its totient is φ = 38557728.

The previous prime is 77152661. The next prime is 77152679. The reversal of 77152666 is 66625177.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71995225 + 5157441 = 8485^2 + 2271^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77152661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361 + ... + 12868.

Almost surely, 2^77152666 is an apocalyptic number.

77152666 is a deficient number, since it is larger than the sum of its proper divisors (38632154).

77152666 is a wasteful number, since it uses less digits than its factorization.

77152666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18608.

The product of its digits is 105840, while the sum is 40.

The square root of 77152666 is about 8783.6590325445. The cubic root of 77152666 is about 425.7130654633.

The spelling of 77152666 in words is "seventy-seven million, one hundred fifty-two thousand, six hundred sixty-six".