766188149 has 4 divisors (see below), whose sum is σ = 792608460. Its totient is φ = 739767840.

The previous prime is 766188133. The next prime is 766188161. The reversal of 766188149 is 941881667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941881667 = 8623 ⋅109229.

It can be written as a sum of positive squares in 2 ways, for example, as 540888049 + 225300100 = 23257^2 + 15010^2 .

It is a cyclic number.

It is not a de Polignac number, because 766188149 - 2⁴ = 766188133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766188097 and 766188106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766188179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13210112 + ... + 13210169.

It is an arithmetic number, because the mean of its divisors is an integer number (198152115).

Almost surely, 2^766188149 is an apocalyptic number.

It is an amenable number.

766188149 is a deficient number, since it is larger than the sum of its proper divisors (26420311).

766188149 is a wasteful number, since it uses less digits than its factorization.

766188149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26420310.

The product of its digits is 580608, while the sum is 50.

The square root of 766188149 is about 27680.1038473486. The cubic root of 766188149 is about 915.0506701513.

The spelling of 766188149 in words is "seven hundred sixty-six million, one hundred eighty-eight thousand, one hundred forty-nine".