64662500 has 72 divisors (see below), whose sum is σ = 161864640. Its totient is φ = 22140000.

The previous prime is 64662487. The next prime is 64662503. The reversal of 64662500 is 526646.

It is a sliding number, since 64662500 = 25600000 + 39062500 and 1/25600000 + 1/39062500 = 0.000000064662500.

It is not an unprimeable number, because it can be changed into a prime (64662503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87131 + ... + 87869.

It is an arithmetic number, because the mean of its divisors is an integer number (2248120).

Almost surely, 2^64662500 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 64662500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80932320).

64662500 is an abundant number, since it is smaller than the sum of its proper divisors (97202140).

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

64662500 is an equidigital number, since it uses as much as digits as its factorization.

64662500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64662500 is about 8041.2996462015. The cubic root of 64662500 is about 401.3754730963.

The spelling of 64662500 in words is "sixty-four million, six hundred sixty-two thousand, five hundred".