64766749 has 2 divisors, whose sum is σ = 64766750. Its totient is φ = 64766748.

The previous prime is 64766731. The next prime is 64766791. The reversal of 64766749 is 94766746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 28164249 = 6050^2 + 5307^2 .

It is a cyclic number.

It is not a de Polignac number, because 64766749 - 2⁵ = 64766717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64706749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32383374 + 32383375.

It is an arithmetic number, because the mean of its divisors is an integer number (32383375).

Almost surely, 2^64766749 is an apocalyptic number.

It is an amenable number.

64766749 is a deficient number, since it is larger than the sum of its proper divisors (1).

64766749 is an equidigital number, since it uses as much as digits as its factorization.

64766749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 49.

The square root of 64766749 is about 8047.7791346433. The cubic root of 64766749 is about 401.5910567054.

It can be divided in two parts, 6476 and 6749, that added together give a square (13225 = 115²).

The spelling of 64766749 in words is "sixty-four million, seven hundred sixty-six thousand, seven hundred forty-nine".