66457000 has 32 divisors (see below), whose sum is σ = 155511720. Its totient is φ = 26582400.

The previous prime is 66456991. The next prime is 66457031. The reversal of 66457000 is 75466.

It can be written as a sum of positive squares in 4 ways, for example, as 10536516 + 55920484 = 3246^2 + 7478^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66457000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32229 + ... + 34228.

Almost surely, 2^66457000 is an apocalyptic number.

It is an amenable number.

66457000 is an abundant number, since it is smaller than the sum of its proper divisors (89054720).

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

66457000 is a wasteful number, since it uses less digits than its factorization.

66457000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66478 (or 66464 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 66457000 is about 8152.1162896514. The cubic root of 66457000 is about 405.0546082947.

The spelling of 66457000 in words is "sixty-six million, four hundred fifty-seven thousand".