64156066 has 8 divisors (see below), whose sum is σ = 103636764. Its totient is φ = 29610480.

The previous prime is 64156049. The next prime is 64156067. The reversal of 64156066 is 66065146.

It can be written as a sum of positive squares in 2 ways, for example, as 55577025 + 8579041 = 7455^2 + 2929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64156067) 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, 1233745 + ... + 1233796.

Almost surely, 2^64156066 is an apocalyptic number.

64156066 is a deficient number, since it is larger than the sum of its proper divisors (39480698).

64156066 is a wasteful number, since it uses less digits than its factorization.

64156066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467556.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 64156066 is about 8009.7481858046. The cubic root of 64156066 is about 400.3248735715.

The spelling of 64156066 in words is "sixty-four million, one hundred fifty-six thousand, sixty-six".