64606811 has 4 divisors (see below), whose sum is σ = 65981472. Its totient is φ = 63232152.

The previous prime is 64606799. The next prime is 64606837. The reversal of 64606811 is 11860646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64606811 - 2¹⁸ = 64344667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64606111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687260 + ... + 687353.

It is an arithmetic number, because the mean of its divisors is an integer number (16495368).

Almost surely, 2^64606811 is an apocalyptic number.

64606811 is a deficient number, since it is larger than the sum of its proper divisors (1374661).

64606811 is a wasteful number, since it uses less digits than its factorization.

64606811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374660.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 64606811 is about 8037.8362138078. The cubic root of 64606811 is about 401.2602150588.

The spelling of 64606811 in words is "sixty-four million, six hundred six thousand, eight hundred eleven".