66770535 has 16 divisors (see below), whose sum is σ = 115051104. Its totient is φ = 32871552.

The previous prime is 66770531. The next prime is 66770549. The reversal of 66770535 is 53507766.

It is not a de Polignac number, because 66770535 - 2² = 66770531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 66770493 and 66770502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770531) 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, 171012 + ... + 171401.

It is an arithmetic number, because the mean of its divisors is an integer number (7190694).

Almost surely, 2^66770535 is an apocalyptic number.

66770535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66770535 is a deficient number, since it is larger than the sum of its proper divisors (48280569).

66770535 is a wasteful number, since it uses less digits than its factorization.

66770535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342434.

The product of its (nonzero) digits is 132300, while the sum is 39.

The square root of 66770535 is about 8171.3239441354. The cubic root of 66770535 is about 405.6906064965.

The spelling of 66770535 in words is "sixty-six million, seven hundred seventy thousand, five hundred thirty-five".