66960465 has 128 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 26956800.

The previous prime is 66960461. The next prime is 66960511. The reversal of 66960465 is 56406966.

It is not a de Polignac number, because 66960465 - 2² = 66960461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66960461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1263379 + ... + 1263431.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^66960465 is an apocalyptic number.

66960465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66960465 is an abundant number, since it is smaller than the sum of its proper divisors (72385455).

66960465 is a wasteful number, since it uses less digits than its factorization.

66960465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 66960465 is about 8182.9374310207. The cubic root of 66960465 is about 406.0749071103.

It can be divided in two parts, 66960 and 465, that multiplied together give a square (31136400 = 5580²).

The spelling of 66960465 in words is "sixty-six million, nine hundred sixty thousand, four hundred sixty-five".