66860862 has 32 divisors (see below), whose sum is σ = 144046080. Its totient is φ = 20628960.

The previous prime is 66860821. The next prime is 66860891. The reversal of 66860862 is 26806866.

It is a congruent number.

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, 3537 + ... + 12092.

It is an arithmetic number, because the mean of its divisors is an integer number (4501440).

Almost surely, 2^66860862 is an apocalyptic number.

66860862 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66860862 is an abundant number, since it is smaller than the sum of its proper divisors (77185218).

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

66860862 is a wasteful number, since it uses less digits than its factorization.

66860862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15688.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 66860862 is about 8176.8491486636. The cubic root of 66860862 is about 405.8734631187.

The spelling of 66860862 in words is "sixty-six million, eight hundred sixty thousand, eight hundred sixty-two".