66461370 has 16 divisors (see below), whose sum is σ = 159507360. Its totient is φ = 17723024.

The previous prime is 66461341. The next prime is 66461371. The reversal of 66461370 is 7316466.

It is a super-2 number, since 2×66461370² = 8834227404553800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66461371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107660 + ... + 1107719.

It is an arithmetic number, because the mean of its divisors is an integer number (9969210).

Almost surely, 2^66461370 is an apocalyptic number.

66461370 is an abundant number, since it is smaller than the sum of its proper divisors (93045990).

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

66461370 is a wasteful number, since it uses less digits than its factorization.

66461370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215389.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66461370 is about 8152.3843138066. The cubic root of 66461370 is about 405.0634864658.

The spelling of 66461370 in words is "sixty-six million, four hundred sixty-one thousand, three hundred seventy".