77099665 has 8 divisors (see below), whose sum is σ = 93031848. Its totient is φ = 61338240.

The previous prime is 77099653. The next prime is 77099677. The reversal of 77099665 is 56699077.

It is an interprime number because it is at equal distance from previous prime (77099653) and next prime (77099677).

It can be written as a sum of positive squares in 4 ways, for example, as 221841 + 76877824 = 471^2 + 8768^2 .

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

It is not a de Polignac number, because 77099665 - 2⁷ = 77099537 is a prime.

It is a super-2 number, since 2×77099665² = 11888716686224450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41692 + ... + 43501.

It is an arithmetic number, because the mean of its divisors is an integer number (11628981).

Almost surely, 2^77099665 is an apocalyptic number.

It is an amenable number.

77099665 is a deficient number, since it is larger than the sum of its proper divisors (15932183).

77099665 is a wasteful number, since it uses less digits than its factorization.

77099665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85379.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 77099665 is about 8780.6414913718. The cubic root of 77099665 is about 425.6155601403.

The spelling of 77099665 in words is "seventy-seven million, ninety-nine thousand, six hundred sixty-five".