66091602 has 16 divisors (see below), whose sum is σ = 135257760. Its totient is φ = 21518112.

The previous prime is 66091601. The next prime is 66091603. The reversal of 66091602 is 20619066.

It is an interprime number because it is at equal distance from previous prime (66091601) and next prime (66091603).

It is a self number, because there is not a number n which added to its sum of digits gives 66091602.

It is not an unprimeable number, because it can be changed into a prime (66091601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127827 + ... + 128342.

It is an arithmetic number, because the mean of its divisors is an integer number (8453610).

Almost surely, 2^66091602 is an apocalyptic number.

66091602 is an abundant number, since it is smaller than the sum of its proper divisors (69166158).

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

66091602 is a wasteful number, since it uses less digits than its factorization.

66091602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256217.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 66091602 is about 8129.6741632122. The cubic root of 66091602 is about 404.3108780920.

The spelling of 66091602 in words is "sixty-six million, ninety-one thousand, six hundred two".