66672151 has 16 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 52626528.

The previous prime is 66672127. The next prime is 66672163. The reversal of 66672151 is 15127666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66672151 - 2⁵ = 66672119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66642151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64920 + ... + 65938.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^66672151 is an apocalyptic number.

66672151 is a deficient number, since it is larger than the sum of its proper divisors (15580649).

66672151 is a wasteful number, since it uses less digits than its factorization.

66672151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758.

The product of its digits is 15120, while the sum is 34.

The square root of 66672151 is about 8165.3016478266. The cubic root of 66672151 is about 405.4912516744.

The spelling of 66672151 in words is "sixty-six million, six hundred seventy-two thousand, one hundred fifty-one".