66602260 has 96 divisors (see below), whose sum is σ = 156764160. Its totient is φ = 23654400.

The previous prime is 66602251. The next prime is 66602269. The reversal of 66602260 is 6220666.

66602260 = T₄₂₅ + T₄₂₆ + ... + T₇₈₀.

It is an interprime number because it is at equal distance from previous prime (66602251) and next prime (66602269).

It is a super-2 number, since 2×66602260² = 8871722074215200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66602269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 748296 + ... + 748384.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^66602260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66602260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78382080).

66602260 is an abundant number, since it is smaller than the sum of its proper divisors (90161900).

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

66602260 is a wasteful number, since it uses less digits than its factorization.

66602260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66602260 is about 8161.0207694871. The cubic root of 66602260 is about 405.3495128463.

The spelling of 66602260 in words is "sixty-six million, six hundred two thousand, two hundred sixty".