766450491 has 16 divisors (see below), whose sum is σ = 1083331584. Its totient is φ = 480339584.

The previous prime is 766450463. The next prime is 766450499. The reversal of 766450491 is 194054667.

It is a cyclic number.

It is not a de Polignac number, because 766450491 - 2⁶ = 766450427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766450499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36766 + ... + 53708.

It is an arithmetic number, because the mean of its divisors is an integer number (67708224).

Almost surely, 2^766450491 is an apocalyptic number.

766450491 is a deficient number, since it is larger than the sum of its proper divisors (316881093).

766450491 is a wasteful number, since it uses less digits than its factorization.

766450491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17850.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 766450491 is about 27684.8422607029. The cubic root of 766450491 is about 915.1550956896.

It can be divided in two parts, 766450 and 491, that added together give a triangular number (766941 = T₁₂₃₈).

The spelling of 766450491 in words is "seven hundred sixty-six million, four hundred fifty thousand, four hundred ninety-one".