66701270 has 32 divisors (see below), whose sum is σ = 123171840. Its totient is φ = 25997920.

The previous prime is 66701231. The next prime is 66701273. The reversal of 66701270 is 7210766.

It is a super-2 number, since 2×66701270² = 8898118839225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66701273) 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, 76859 + ... + 77721.

It is an arithmetic number, because the mean of its divisors is an integer number (3849120).

Almost surely, 2^66701270 is an apocalyptic number.

66701270 is a deficient number, since it is larger than the sum of its proper divisors (56470570).

66701270 is a wasteful number, since it uses less digits than its factorization.

66701270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 66701270 is about 8167.0845471319. The cubic root of 66701270 is about 405.5502757248.

The spelling of 66701270 in words is "sixty-six million, seven hundred one thousand, two hundred seventy".