76780101 has 4 divisors (see below), whose sum is σ = 102373472. Its totient is φ = 51186732.

The previous prime is 76780091. The next prime is 76780103. The reversal of 76780101 is 10108767.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 76780101 - 2¹⁰ = 76779077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76780103) 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, 12796681 + ... + 12796686.

It is an arithmetic number, because the mean of its divisors is an integer number (25593368).

Almost surely, 2^76780101 is an apocalyptic number.

It is an amenable number.

76780101 is a deficient number, since it is larger than the sum of its proper divisors (25593371).

76780101 is a wasteful number, since it uses less digits than its factorization.

76780101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25593370.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 76780101 is about 8762.4255203682. The cubic root of 76780101 is about 425.0267129692.

Adding to 76780101 its reverse (10108767), we get a palindrome (86888868).

The spelling of 76780101 in words is "seventy-six million, seven hundred eighty thousand, one hundred one".