1661602607 has 16 divisors (see below), whose sum is σ = 1940000832. Its totient is φ = 1393701120.

The previous prime is 1661602571. The next prime is 1661602637. The reversal of 1661602607 is 7062061661.

It is not a de Polignac number, because 1661602607 - 2⁶ = 1661602543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661602637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74243 + ... + 93995.

It is an arithmetic number, because the mean of its divisors is an integer number (121250052).

Almost surely, 2^1661602607 is an apocalyptic number.

1661602607 is a deficient number, since it is larger than the sum of its proper divisors (278398225).

1661602607 is a wasteful number, since it uses less digits than its factorization.

1661602607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20018.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1661602607 is about 40762.7600513017. The cubic root of 1661602607 is about 1184.4290619052.

The spelling of 1661602607 in words is "one billion, six hundred sixty-one million, six hundred two thousand, six hundred seven".