66737545 has 16 divisors (see below), whose sum is σ = 93760128. Its totient is φ = 44645760.

The previous prime is 66737543. The next prime is 66737581. The reversal of 66737545 is 54573766.

It is not a de Polignac number, because 66737545 - 2¹ = 66737543 is a prime.

It is a super-3 number, since 3×66737545³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66737543) 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, 21819 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (5860008).

Almost surely, 2^66737545 is an apocalyptic number.

It is an amenable number.

66737545 is a deficient number, since it is larger than the sum of its proper divisors (27022583).

66737545 is a wasteful number, since it uses less digits than its factorization.

66737545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46560.

The product of its digits is 529200, while the sum is 43.

The square root of 66737545 is about 8169.3050500027. The cubic root of 66737545 is about 405.6237809228.

The spelling of 66737545 in words is "sixty-six million, seven hundred thirty-seven thousand, five hundred forty-five".