377641665 has 12 divisors (see below), whose sum is σ = 654578964. Its totient is φ = 201408864.

The previous prime is 377641657. The next prime is 377641673. The reversal of 377641665 is 566146773.

It is an interprime number because it is at equal distance from previous prime (377641657) and next prime (377641673).

It can be written as a sum of positive squares in 2 ways, for example, as 127780416 + 249861249 = 11304^2 + 15807^2 .

It is not a de Polignac number, because 377641665 - 2³ = 377641657 is a prime.

It is a super-2 number, since 2×377641665² = 285226454287944450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8392037 = 377641665 / (3 + 7 + 7 + 6 + 4 + 1 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 377641665.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4195974 + ... + 4196063.

It is an arithmetic number, because the mean of its divisors is an integer number (54548247).

Almost surely, 2^377641665 is an apocalyptic number.

It is an amenable number.

377641665 is a deficient number, since it is larger than the sum of its proper divisors (276937299).

377641665 is a wasteful number, since it uses less digits than its factorization.

377641665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8392048 (or 8392045 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 377641665 is about 19433.0045283790. The cubic root of 377641665 is about 722.8141312698.

The spelling of 377641665 in words is "three hundred seventy-seven million, six hundred forty-one thousand, six hundred sixty-five".