66702540 has 48 divisors (see below), whose sum is σ = 196600320. Its totient is φ = 16850880.

The previous prime is 66702473. The next prime is 66702569. The reversal of 66702540 is 4520766.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 66702498 and 66702507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28116 + ... + 30395.

It is an arithmetic number, because the mean of its divisors is an integer number (4095840).

Almost surely, 2^66702540 is an apocalyptic number.

66702540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66702540 is an abundant number, since it is smaller than the sum of its proper divisors (129897780).

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

66702540 is a wasteful number, since it uses less digits than its factorization.

66702540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58542 (or 58540 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 66702540 is about 8167.1622978854. The cubic root of 66702540 is about 405.5528496167.

The spelling of 66702540 in words is "sixty-six million, seven hundred two thousand, five hundred forty".