66764151 has 24 divisors (see below), whose sum is σ = 103278240. Its totient is φ = 41412096.

The previous prime is 66764149. The next prime is 66764161. The reversal of 66764151 is 15146766.

66764151 is a `hidden beast` number, since 6 + 6 + 7 + 641 + 5 + 1 = 666.

It is not a de Polignac number, because 66764151 - 2¹ = 66764149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66764141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11166 + ... + 16068.

It is an arithmetic number, because the mean of its divisors is an integer number (4303260).

Almost surely, 2^66764151 is an apocalyptic number.

66764151 is a deficient number, since it is larger than the sum of its proper divisors (36514089).

66764151 is a wasteful number, since it uses less digits than its factorization.

66764151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015 (or 5012 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 66764151 is about 8170.9333004254. The cubic root of 66764151 is about 405.6776765847.

The spelling of 66764151 in words is "sixty-six million, seven hundred sixty-four thousand, one hundred fifty-one".