66670695 has 128 divisors (see below), whose sum is σ = 149882880. Its totient is φ = 27713664.

The previous prime is 66670691. The next prime is 66670699. The reversal of 66670695 is 59607666.

It is an interprime number because it is at equal distance from previous prime (66670691) and next prime (66670699).

It is not a de Polignac number, because 66670695 - 2² = 66670691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66670695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670691) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 995052 + ... + 995118.

It is an arithmetic number, because the mean of its divisors is an integer number (1170960).

Almost surely, 2^66670695 is an apocalyptic number.

66670695 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66670695 is an abundant number, since it is smaller than the sum of its proper divisors (83212185).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66670695 is an equidigital number, since it uses as much as digits as its factorization.

66670695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 66670695 is about 8165.2124895804. The cubic root of 66670695 is about 405.4882999194.

It can be divided in two parts, 66 and 670695, that added together give a square (670761 = 819²).

The spelling of 66670695 in words is "sixty-six million, six hundred seventy thousand, six hundred ninety-five".