76649851 has 2 divisors, whose sum is σ = 76649852. Its totient is φ = 76649850.

The previous prime is 76649849. The next prime is 76649861. The reversal of 76649851 is 15894667.

It is a weak prime.

It is an emirp because it is prime and its reverse (15894667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76649851 - 2¹ = 76649849 is a prime.

Together with 76649849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76649831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38324925 + 38324926.

It is an arithmetic number, because the mean of its divisors is an integer number (38324926).

Almost surely, 2^76649851 is an apocalyptic number.

76649851 is a deficient number, since it is larger than the sum of its proper divisors (1).

76649851 is an equidigital number, since it uses as much as digits as its factorization.

76649851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 76649851 is about 8754.9900628156. The cubic root of 76649851 is about 424.7862380617.

The spelling of 76649851 in words is "seventy-six million, six hundred forty-nine thousand, eight hundred fifty-one".