66150917 has 16 divisors (see below), whose sum is σ = 78406272. Its totient is φ = 54631680.

The previous prime is 66150911. The next prime is 66150923. The reversal of 66150917 is 71905166.

It is an interprime number because it is at equal distance from previous prime (66150911) and next prime (66150923).

It is not a de Polignac number, because 66150917 - 2⁶ = 66150853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66150911) 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, 22433 + ... + 25209.

It is an arithmetic number, because the mean of its divisors is an integer number (4900392).

Almost surely, 2^66150917 is an apocalyptic number.

It is an amenable number.

66150917 is a deficient number, since it is larger than the sum of its proper divisors (12255355).

66150917 is a wasteful number, since it uses less digits than its factorization.

66150917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 66150917 is about 8133.3214002645. The cubic root of 66150917 is about 404.4317937521.

It can be divided in two parts, 661509 and 17, that multiplied together give a triangular number (11245653 = T₄₇₄₂).

The spelling of 66150917 in words is "sixty-six million, one hundred fifty thousand, nine hundred seventeen".