1620607666623 has 32 divisors (see below), whose sum is σ = 2438844595200. Its totient is φ = 948196368000.

The previous prime is 1620607666621. The next prime is 1620607666693. The reversal of 1620607666623 is 3266667060261.

It is not a de Polignac number, because 1620607666623 - 2¹ = 1620607666621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620607666621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7648138 + ... + 7857176.

It is an arithmetic number, because the mean of its divisors is an integer number (76213893600).

Almost surely, 2^{1620607666623} is an apocalyptic number.

1620607666623 is a deficient number, since it is larger than the sum of its proper divisors (818236928577).

1620607666623 is a wasteful number, since it uses less digits than its factorization.

1620607666623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217183.

The product of its (nonzero) digits is 3919104, while the sum is 51.

The spelling of 1620607666623 in words is "one trillion, six hundred twenty billion, six hundred seven million, six hundred sixty-six thousand, six hundred twenty-three".