64777487 has 2 divisors, whose sum is σ = 64777488. Its totient is φ = 64777486.

The previous prime is 64777483. The next prime is 64777511. The reversal of 64777487 is 78477746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64777487 - 2² = 64777483 is a prime.

It is a super-2 number, since 2×64777487² = 8392245644070338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64777481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32388743 + 32388744.

It is an arithmetic number, because the mean of its divisors is an integer number (32388744).

Almost surely, 2^64777487 is an apocalyptic number.

64777487 is a deficient number, since it is larger than the sum of its proper divisors (1).

64777487 is an equidigital number, since it uses as much as digits as its factorization.

64777487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1843968, while the sum is 50.

The square root of 64777487 is about 8048.4462475685. The cubic root of 64777487 is about 401.6132494022.

The spelling of 64777487 in words is "sixty-four million, seven hundred seventy-seven thousand, four hundred eighty-seven".