66071674 has 8 divisors (see below), whose sum is σ = 99226260. Its totient is φ = 32996256.

The previous prime is 66071671. The next prime is 66071737. The reversal of 66071674 is 47617066.

It can be written as a sum of positive squares in 2 ways, for example, as 47018449 + 19053225 = 6857^2 + 4365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66071674² = 8730932210324552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66071671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17659 + ... + 21070.

Almost surely, 2^66071674 is an apocalyptic number.

66071674 is a deficient number, since it is larger than the sum of its proper divisors (33154586).

66071674 is a wasteful number, since it uses less digits than its factorization.

66071674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39584.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66071674 is about 8128.4484374326. The cubic root of 66071674 is about 404.2702379458.

It can be divided in two parts, 6607 and 1674, that added together give a square (8281 = 91²).

The spelling of 66071674 in words is "sixty-six million, seventy-one thousand, six hundred seventy-four".