145406661 has 8 divisors (see below), whose sum is σ = 205280064. Its totient is φ = 91235520.

The previous prime is 145406659. The next prime is 145406663. The reversal of 145406661 is 166604541.

It is a happy number.

145406661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145406659) and next prime (145406663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145406661 - 2¹ = 145406659 is a prime.

It is a super-2 number, since 2×145406661² = 42286194126337842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145406663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1425505 + ... + 1425606.

It is an arithmetic number, because the mean of its divisors is an integer number (25660008).

Almost surely, 2^145406661 is an apocalyptic number.

It is an amenable number.

145406661 is a deficient number, since it is larger than the sum of its proper divisors (59873403).

145406661 is a wasteful number, since it uses less digits than its factorization.

145406661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851131.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 145406661 is about 12058.4684350874. The cubic root of 145406661 is about 525.8494619980.

The spelling of 145406661 in words is "one hundred forty-five million, four hundred six thousand, six hundred sixty-one".