66487432 has 16 divisors (see below), whose sum is σ = 135997200. Its totient is φ = 30221520.

The previous prime is 66487429. The next prime is 66487433. The reversal of 66487432 is 23478466.

It is a happy number.

It is a super-2 number, since 2×66487432² = 8841157227909248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66487433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377682 + ... + 377857.

It is an arithmetic number, because the mean of its divisors is an integer number (8499825).

Almost surely, 2^66487432 is an apocalyptic number.

It is an amenable number.

66487432 is an abundant number, since it is smaller than the sum of its proper divisors (69509768).

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

66487432 is a wasteful number, since it uses less digits than its factorization.

66487432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755556 (or 755552 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 66487432 is about 8153.9825852156. The cubic root of 66487432 is about 405.1164264166.

The spelling of 66487432 in words is "sixty-six million, four hundred eighty-seven thousand, four hundred thirty-two".