64420776 has 48 divisors (see below), whose sum is σ = 199399200. Its totient is φ = 18405792.

The previous prime is 64420757. The next prime is 64420789. The reversal of 64420776 is 67702446.

64420776 is a `hidden beast` number, since 644 + 2 + 0 + 7 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64420776.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 63406 + ... + 64413.

It is an arithmetic number, because the mean of its divisors is an integer number (4154150).

Almost surely, 2^64420776 is an apocalyptic number.

It is an amenable number.

64420776 is an abundant number, since it is smaller than the sum of its proper divisors (134978424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64420776 is a wasteful number, since it uses less digits than its factorization.

64420776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127838 (or 127831 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 64420776 is about 8026.2554158213. The cubic root of 64420776 is about 400.8747025112.

The spelling of 64420776 in words is "sixty-four million, four hundred twenty thousand, seven hundred seventy-six".