66740003400 has 96 divisors (see below), whose sum is σ = 236450312640. Its totient is φ = 15254856960.

The previous prime is 66740003389. The next prime is 66740003453. The reversal of 66740003400 is 430004766.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7941039 + ... + 7949438.

It is an arithmetic number, because the mean of its divisors is an integer number (2463024090).

Almost surely, 2^66740003400 is an apocalyptic number.

66740003400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66740003400 is an abundant number, since it is smaller than the sum of its proper divisors (169710309240).

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

66740003400 is a wasteful number, since it uses less digits than its factorization.

66740003400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15890503 (or 15890494 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 66740003400 in words is "sixty-six billion, seven hundred forty million, three thousand, four hundred".