66986045 has 32 divisors (see below), whose sum is σ = 96104448. Its totient is φ = 43864128.

The previous prime is 66985999. The next prime is 66986047. The reversal of 66986045 is 54068966.

It is not a de Polignac number, because 66986045 - 2¹⁶ = 66920509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66985987 and 66986005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66986047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70262 + ... + 71208.

It is an arithmetic number, because the mean of its divisors is an integer number (3003264).

Almost surely, 2^66986045 is an apocalyptic number.

It is an amenable number.

66986045 is a deficient number, since it is larger than the sum of its proper divisors (29118403).

66986045 is a wasteful number, since it uses less digits than its factorization.

66986045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 66986045 is about 8184.5002901827. The cubic root of 66986045 is about 406.1266096270.

It can be divided in two parts, 6698604 and 5, that multiplied together give a triangular number (33493020 = T₈₁₈₄).

The spelling of 66986045 in words is "sixty-six million, nine hundred eighty-six thousand, forty-five".