64674261 has 32 divisors (see below), whose sum is σ = 100867200. Its totient is φ = 40901760.

The previous prime is 64674241. The next prime is 64674289. The reversal of 64674261 is 16247646.

64674261 is a `hidden beast` number, since 646 + 7 + 4 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 64674261 - 2⁷ = 64674133 is a prime.

It is a super-2 number, since 2×64674261² = 8365520071792242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64674221) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 40170 + ... + 41748.

It is an arithmetic number, because the mean of its divisors is an integer number (3152100).

Almost surely, 2^64674261 is an apocalyptic number.

It is an amenable number.

64674261 is a deficient number, since it is larger than the sum of its proper divisors (36192939).

64674261 is a wasteful number, since it uses less digits than its factorization.

64674261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1660 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 64674261 is about 8042.0309002142. The cubic root of 64674261 is about 401.3998060599.

The spelling of 64674261 in words is "sixty-four million, six hundred seventy-four thousand, two hundred sixty-one".