1666754745 has 32 divisors (see below), whose sum is σ = 2686694400. Its totient is φ = 882334464.

The previous prime is 1666754737. The next prime is 1666754753. The reversal of 1666754745 is 5474576661.

It is an interprime number because it is at equal distance from previous prime (1666754737) and next prime (1666754753).

It is not a de Polignac number, because 1666754745 - 2³ = 1666754737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1644859 + ... + 1645871.

It is an arithmetic number, because the mean of its divisors is an integer number (83959200).

Almost surely, 2^1666754745 is an apocalyptic number.

1666754745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1666754745 is a deficient number, since it is larger than the sum of its proper divisors (1019939655).

1666754745 is a wasteful number, since it uses less digits than its factorization.

1666754745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729.

The product of its digits is 4233600, while the sum is 51.

The square root of 1666754745 is about 40825.9077670050. The cubic root of 1666754745 is about 1185.6519868111.

The spelling of 1666754745 in words is "one billion, six hundred sixty-six million, seven hundred fifty-four thousand, seven hundred forty-five".